THE UNIVERSITY OF MICHIGAN ANN ARBOR, MICHIGAN QUARTERLY PROGRESS REPORT NO. 17 FOR RESEARCH AND DEVELOPMENT ON HIGH-POWER CRESTATRONS FOR THE 100-300 MC FREQUENCY RANGE This report covers the period July 1, 1964 to October 1, 1964 Electron Physics Laboratory Department of Electrical Engineering By: G. T. Konrad Approved by: C. K. Rhee Konrad Project Engineer Jo Row e, Director Electron Physics Laboratory Project 03783 NAVY DEPARTMENT BUREAU OF SHIPS ELECTRONICS DIVISION CONTRACT NO. NObsr-81403 PROJECT SERIAL NO. SF0100 201 TASK NO. 9294 October, 1964

ABSTRACT The dw-Lta obtained in a beam analyzer on a P = 20 hollow-beam electron gun is presented. Certain defects in the gun as well as the beam analyzer require that these data be redone. The final model of the 100-watt Crestatrons to be constructed on tais program is described, Performance data and the required environmental tests were obtained and are summarized in this report, On the basis of these results construction of the three final tubes appears to be warranted, -111

TABLE OF CONTENTS Page ABSTRACT iii LIST OF ILLUSTRATIONS v PERSONNEL vi 1. INTRODUCTION 1 2. WORK ON ELECTROSTATICALLY FOCUSED GUNS 1 3. WORK CONDUCTED AT THE BENDIX RESEARCH LABORATORIES 8 3.1 Introduction 8 3.2 Tube TW-148-1 9 3.3 Tube TW-148-2 9 3.4 Tube TW-148-3 12 355 Electron Gun 16 3o6 Focusing Systems 16 4. SUMMARY AND FUTURE WORK 16 -iv

LIST OF ILLUSTRATIONS Figure Page 2.1 Filament Temperature vs. Filament Power. 3 2.2 Percent Beam Transmission vs. Beam Voltage~ 4 2.3 Comparison of Beam Profiles as a Function of Lens Voltage at a Distance on 0.10 Inch from the Final Gun Anode. 5 2.4 Comparison of Beam Profiles as a Function of Lens Voltage at a Distance of 0.50 Inch from the Final Gun Anode, 6 2.5 Comparison of Beam Profiles as a Function of Anode-Collector Spacing for Lens Voltage = -950 V. 7 351 Power Output vs. Frequency with 7-Watt Input Drive; TW-148-2. 10 3.2 Power Output vs. Frequency for TW-148-2R; 7-Watt and 30-Watt Drives. 11 353 Power Output vso Power Input before Environmental Test; TW-148-3R~ 13 3.4 Power Output vso Power Input after Vibration; TW-148-3R, 14 3o5 Power Output vs. Power Input after Vibration and Shock Tests; TW-148-3Ro 15 3~6 Power Output vs. Frequency at 10-Watts Drive; TW-148-3R. 17 357 Maximum Power Output vs. Frequency —Optimum Drive Power; TW-148-3R. 18

PERSONNEL Time Worked in Scientific and Engineering Personnel Man Ivlonths* G. Konrad Associate Research Engineer.27 C. Rhee Research Assistant 1.53 Service Personnel.16 * Time Worked is based on 172 hours per month. -vi -

QUARTERLY PROGRESS REPORT NOo 17 FOR RESEARCH AND DEVELOPMENT ON HIGH-POWER CRESTATRONS FOR THE 100-300 MC FREQUENCY RANGE 1o Introduction (Go To Konrad) Contract Nobsr-81403 comprises a research and development program on high-power 100-300 mc Crestatrons. The aim is to construct compact 100-watt Crestatrons employing permanent magnet focusing. Initially the tubes are be tested in a solenoid until they meet electrical specifications, but ultimately the permanent magnet focused tubes employing a depressed potential collector will be ruggedized so as to meet environmental specifications. This work is being conducted by the Bendix Research Laboratories on a subcontract from The University of Michigan~ Theoretical as well as experimental studies on high-perveance hollow-beam electron guns, in addition to electrostatic focusing systems initiated some time ago on this program, are being continued by The University of Michigan. The ultimate goal of these studies is to demonstrate the feasibility of using electrostatically focused, high-power, hollow electron beams in microwave devices. In addition an electron gun design compatible with a high-power vhf Crestatron is to be worked out 2, Work on Electrostatically Focused Guns (C. K. Rhee) The P = 20 gun with a mean beam diameter of 1.076 inch was tested in the beam analyzer during the past quarter~

-2As the heater characteristics shown in Fig. 21l indicate, a much higher filament temperature than expected was required in order to obtain the designed beam current. This clearly indicates that the cathode emission is low. Figure 2~2 shows the percent beam transmission vso beam voltage. The multi-grid sampling collector used in the beam analyzer was not biased throughout this focusing test because of too high average collector currents. The beam transmission is poor but it is expected that the collector biasing would increase the beam transmission appreciably. There is a rather large number of secondary electrons returning to the gun anodes. The various beam profiles were taken for different lens voltages and for several distances between the gun and the collector. The gun was tested at a beam voltage of 1000 volts without collector biasing. A mechanical defect in the beam analyzer permitted only the left half of the beam to be plotted. Representative plots are shown in Figs. 203 through 2.5. Figures 2~3 and 2~4 show the beam shape as a function of lens voltage for two different anode-collector distances. In Fig. 2~3 it is noticed that the beam thickness is well controlled by the lens. A lens voltage of -950 volts gave the best beam transmission~ As the distance between the gun and collector rods is increased, the beam becomes thicker due to space-charge forces. It is also noticed that the center of the beam is shifted. Figure 2~5 shows a plot of the beam shape as a function of the anode-collector distance for a lens voltage of -950 volts for which the maximum collector current was obtained. In view of the above results it will be necessary to retest the gun during the coming quarter~ For this purpose a new cathode has been installed and the necessary repairs in the beam analyzer have been made.

-31200 OPERATING VALUE (-) o 1100 z w 0 < 1000'r 900 I 800 0 50 100 150 200 Pf IN WATTS FIG. 2.1 FILAMENT TEMPERATURE VS. FILAMENT POWER.

60 z 0 o) z (w 50 CL W F I or t 40 0 200 400 600 800 0 200 400 600 800 1000 1200 1400 BEAM VOLTAGE IN VOLTS FIG. 2.2 PERCENT BEAM TRANSMISSION VS. BEAM VOLTAGE.

-5-VL -1150V c:/ cn V -1050 V 0 / 0 0.4 0.5 0.6 0.7 0.8 RADIAL DISTANCE, INCHES FIG. 2.3 COMPARISON OF BEAM PROFILES AS A FUNCTION OF LENS VOLTAGE AT A DISTANCE OF 0.10 INCH FROM THE FINAL GUN ANODE.

-6Z'I cc "' —-VL 1150V _mcf)~~~ VL -1050 V z /H ~-~~\v = -95oV 0L_ I I I 0 0.3 0.4 0.5 0.6 0.7 RADIAL DISTANCE, INCHES FIG. 2.4 COMPARISON OF BEAM PROFILES AS A FUNCTION OF LENS VOLTAGE AT A DISTANCE OF 0.50 INCH FROM THE FINAL GUN ANODE.

-7c, z cr' D. — -- d =.1".5 I — O) z 0 0.4 0.5 0.6 0.7 0.8 RADIAL DISTANCE, INCHES FIG. 2.5 COMPARISON OF BEAM PROFILES AS A FUNCTION OF ANODE-COLLECTOR SPACING FOR LENS VOLTAGE = -950 V.

-83. Work Conducted at the Bendix Research Laboratories* 3.1 Introduction. The work on the development program to build a 100-watt, 100-300 mc traveling-wave amplifier has been divided into two tasks, the first of which is completed. TASK I This task resulted in the design and fabrication of a tube (TW-147) compatible with solenoid operation which met or exceeded the specified minimum power output across the required frequency band. However, the tube exhibited inverse saturation characteristics and the minimum power output point occurred at the low end (100 mc) of the band. This task also included the design of a permanent magnet focusing structure, but this effort was deferred so that an evaluation of several focusing schemes applicable to this tube could be included. Consequently, the selection and fabrication of a particular focusing structure is to be performed during Task II. TASK II Three tubes which meet the electrical and environmental contractual requirements will be fabricated and delivered. These tubes will incorporate both electrical design modifications, to more reliably meet the power output requirements at the low frequency end of the band, and a completely new mechanical design. Important mechanical design considerations included ease of parts fabrication and assembly, reduction in size and weight, and changes required to meet the environmental specifications. These tubes will utilize the focusing method as determined best by mutual agreement, after reviewing the computations for several focusing * This material was submitted by A. G. Peifer of the Bendix Research Laboratpries.

-93 2 Tube TW-148-1. The first tube assembled developed a shorted helix; consequently, only the electron gun tests were performed, The gun operated at design perveance and at full rated beam current, However, Anode No, 1 intercepted excessive beam current at rated parameter values, but was held within an acceptable limit by increasing the solenoid magnetic field. Upon disassembly, an inspection of the gun revealed that the outer electrode stack was not properly aligned. Thus, a skewed electric field was produced in the critical anode-to-cathode space. This electron gun was used in the first two assemblies of Tube TW-148-2, 353 Tube TW-148-2o This tube was assembled with 2 to 8 db of loss added to the helix circuit. The gun from Tube No. 1 was used in this tube, The small-signal band center occurred at about 250 mco The electronic gain was 8 db at 100 mc, 13 db at 200 mc, 13 db at 300 mc and 12 db at 400 mc. The net gain ranged from 4o5 to 7 db across the band. A constant 7D-watb input level was used in determining this gain., Figure 3.1 shows the power out and gain vs. frequency for 7-watt input signal. Tube No. 2 was then rebuilt and designated 2Ro The same electron gun was used, but the 2 to 8 db of helix loss was removed. The gain increased 1 to 2 db over the same circuit with added losso Net gains ranged from 6 to 9 db with saturated outputs exceeding 100 watts. Figure 5.2 shows the power output vs. frequency for both. a 7-watt and a 30-watt drive input signal. Tube No, 2 was rebuilt a second time with a new gun which had the electrodes in the proper position, This gun operated as predicted, but little difference was noted in either gain or power output, as compared to Tube 2Ro After extensive testing, this tube developed a leak and became inoperable,

80 10 607 - 0 S 100 125 150 175 200 225 250 275 300 FREQUENCY - mc FIG. 3.1 POWER OUTPUT VS. FREQUENCY WITH 7-WATTS INPUT DRIVE; TW-148-2.

I SO I I I I I I I Iv I 140 120 100 125 150 175 200 225 250 275 300 FREQUENCY - mc FIG. 10.2 POWER OUTPUT VS. FREQ CY FOR TW-18-2R; 7-WATT AND 30-WATT DRIVES. soPI I-. I-. ~ ~ ~ ~ ~ ~~~~AT RV!0 ~2m ds._ 12 5 - 1520 - 252027 0 FREQUENCY ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~-.'

-12Gun No. 1 was put back into the tube and the tube designated 2RR.R This tube is now being used as a driver in the testing of subsequent tubes. 3.4 Tube TW-148-3. As a result of the extensive tests performed on TW-148-2 the r-f structure was lengthened to provide more gain. In addition, the output r-f match was redesigned for a lower cutoff frequency to improve the tube performance at and near 100 mc. Tube TW-148-3 was assembled and processed. Partial gun failure required immediate replacement of the gun. The tube was then designated 3R. This longer circuit had no added loss and utilized the new output r-f matching section. The gain of Tube 3R, both small and large signals was within acceptable limits. Figure 3.3 shows a plot of power output vs. power input at several frequencies. After the data shown in Fig. 3.3 was taken, the tube was subjected to the nonoperating vibration tests. The tube was vibrated parallel to the axis of the tube with a frequency of 5 c.p-s. to 500 c.p.so and at an amplitude of 0 12 inch or 5 g, whichever was the limiting value The rate of frequency change was such that 5 c pos. to 500 c.p.s. and back to 5 c.po.s took about 15 minutes. The test continued for 60 minutes. Tube 3R was then thoroughly retested. Figure 3.4 shows the power output vs. power input data obtained. As can be seen, no significant changes occurred as a result of the vibration tests. The tube was then subjected to shock tests and again no adverse effects were detected. The test consisted of a 15 g shock for 11 + 1 millisecond duration with six shocks in each of three mutually perpendicular directions. Figure 3.5 shows the power output vs. power input characteristics of the tube after shock.

200 l I I l J I I.....X.X __ 150 100 1mV 1020M ~3'K 500 ma 4 __ -S= 600 GAUSS 10 Pin - WATTS FIG. 5.3 POWER OUTPUT VS. POWER INPUT BEFORE ENVIRONMENTAL TESTS; TW-148-3R.

200 - - -.....00 ~~ 00 mL-.. 100't S- 1_ T 1.1. T I.150 Mc ~I Z/ - 1 1 I Tf'~ I 1 1 _ 1.I020 1-., " ts'dTr1,1,1) fl IT r X T t- - W W Z I |I I I I I I I 1rK 1 500 1 1 1 10 100 Pin - WATTS FIG. 3.4 POWER OUTPUT VS. POWER INPUT AFTER VIBRATION; TW-148-3R.

200........ 300 mc 150 250 mc Goo- -._._ 200 m. 100 150 Mc V = 1020 B = 600 AUSS IK = 50~~~U00 ~~'.0 GUS10S ~~0 ~~~~~~~~Pi - WATTS FIG. 3.5 POWER OUTPUT VS. POWER INPUT AFTER VIBRATION AND SHOCK TESTS; TW-148-5R.

Figure 3.6 is a plot of the power output vs. frequency with a 10-watt input drive signal for the three measurements discussed above. Figure 3.7 shows a plot of the maximum power output vs. frequency as obtained by using optimum input signals for each frequency. 3.5 Electron Gun. Although the two-anode gun performed satisfactorily, a one-anode gun was assembled and tested in Tube No. 3, This tube was designated TW-148-3RR. This one-anode gun provided r-f performance equivalent to that obtained with the two-anode gun. Thus, in the interest of simplicity, subsequent tubes will contain one-anode guns. 3.6 Focusing Systems. As was reported previously the magnetic field provided by the laboratory solenoid was not uniform in the gun region. A magnetic shunt was made which corrected this deficiency. Tube No. 3RR was then retested to determine the amount of change in r-f performance. These tests showed that only small changes in the r-f performance occurred, with less interception on the anode and slightly more interception on the helix. A magnet weight of 8 to 10 pounds was forecast based on a 400 gauss magnetic field and the short length of TW-148-2o However, the tubes operating in the laboratory have performed best when the magnetic field strength is at or above 500 gauss. A new weight of 15 pounds has been calculated for a straight permanent magnet capable of providing 500 gauss over the new required length. Quotations from outside vendors, have been requested. 4. Summary and Future Work (G. T. Konrad) The larger of the P = 20 guns designed by use of the digital computer programs for electrostatically focused beams and described in previous reports was constructed and tested in the beam analyzer. The

-17200 - - --.. 150 - AFT ER SHOCK BEFORE TESTS AFTER VIBRATION.... I I I I I I.......... l o ~TW -1 48 - 3R Vo - 1020 10W DRIVE IK 500ma THREE MEAS: BEFORE ENVIRONMENTAL, AFTER VIBRATION, AFTER SHOCK 10 100 150 200 250 300 350 FREQUENCY - mc FIG. 3.6 POWER OUTPUT VS. FREQUENCY AT 10-WATTS DRIVE; TW-148-3R.

-18200... __.... BEFORE TESTS AFTIE SHOCKAFTER VIBRATION. _ I —. TW - 148 - 3R V = 1020 IK = 500 ma 4TO20W DRIVES MAX Po THREE MEAS: BEFORE ENVIRONMENTAL; AFTER VIBRATION & AFTER SHOCK 10 1 00 150 200 250 300 350 FREQUENCY- mc FIG. 3.7 MAXIMUM POWER OUTPUT VS. FREQUENCY —OPTIMUM DRIVE POWER; TW-148-3R.

-19beam configuration appears to be satisfactory, but another test is planned for the next quarter. It is hoped that some of the difficulties encountered in the tests described in this report can be overcome by replacing the cathode and repairing the beam analyzer. The preliminary environmental tests made on the 100-watt vhf tube appear to be satisfactory. No appreciable changes in tube performance were noted as a result of these tests, Thus several more tubes will be built during the coming quarter, final environmental tests will be run and three final model tubes will be delivered in accordance with contractual requirements.

DISTRIBUTI ON LIST No. Copies Agency 1 Commanding Officer and Director, U. S. Navy Electronics Laboratory, San Diego 52, California 2 Commander, Aeronautical Systems Division, Wright-Patterson Air Force Base, Ohio, Attn: ASRN 1 Mr. J. Enright, ASRNET-1, Electronic Technology Laboratory, Aeronautical Systems Division, Wright-Patterson Air Force Base, Ohio 1 Commanding Officer, Harry Diamond Laboratories, Electron Tube Branch, Washington 25, D. C. 2 Commanding Officer, U. S. Army Electronics Research and Development Laboratory, Electron Devices Division, Fort Monmouth, New Jersey 1 Commander, New York Naval Shipyard, Material Laboratory, Code 924, Naval Base, Brooklyn 1, New York 2 Chief, Bureau of Naval Weapons, Department of the Navy, Washington 25, D. C., Attn: RAAV-4423 1 Chief, Bureau of Ships, Department of the Navy, Washington 25, D. C., Attn: Code 691A4 4 Chief, Bureau of Ships, Department of the Navy, Washington 25, D. C., Attn: Code 335 1 Director, U. S. Naval Research Laboratory, Washington 25, D. C., Attn: Code 5240, Dr. S. T. Smith 1 Director, U. S. Naval Research Laboratory, Washington 25, D. C., Attn: Mr. L. A. Cosby, Code 5437 2 Director, U. S. Naval Research Laboratory, Washington 25, D. C., Attn: Library 2 Advisory Group on Electron Tubes, 346 Broadway, 8th Floor, New York 13, New York 1 Commanding General, Rome Air Development Center, Griffiss Air Force Base, Rom, New York, Attn: Documents Library RCOIL-2 1 Commander, Rome Air Development Center, Griffiss Air Force Base, Rome, New York, Attn: Mr. H. Chiosa, RCLRR-3 10 Commander, Defense Documentation Center, Cameron Station, Alexandria, Virginia

No. Copies Agency 1 Dr. G. Rosselot, Bendix Corporation, Research Laboratories, Northwestern Highway and 10-1/2 Mile Road, Southfield, Michigan 1 Dr. J. G. Meeker, Bendix Corporation, Research Laboratories, Northwestern Highway and 10-1/2 Mile Road., Southfield, Michigan 3 Mr. A. G. Peifer, Bendix Corporation, Research Laboratories, Northwestern Highway and 10-1/2 Mile Road, Southfield, Michigan 1 Bendix Corporation, Systems Division, 3300 Plymouth Road, Ann Arbor, Michigan, Attn: Technical Library 1 Litton Industries, 960 Industrial Road, San Carlos, California, Attn: Technical Library 1 Dr. R. P. Wadhwa, Electron Tube Division, Litton Industries, 960 Industrial Way, San Carlos, California 1 The University of Michigan, Willow Run Laboratories, Ypsilanti, Michigan, Attn: Dr. J. T. Wilson 1 Microwave Associates, Burlington, Massachusetts, Attn: Technical Library 1 Microwave Electronic Tube Company, Inc., Salem, Massachusetts, Attn: Technical Library 1 Radio Corporation of America, Power Tube Division, Harrison, New Jersey 1 Raytheon Company, Burlington, Massachusetts, Attn: Technical Library 1 S-F-D Laboratories, 800 Rahway Avenue, Union, New Jersey, Attn: Technical Library 1 Tucor, Inc., 18 Marshall Street, South Norwalk, Connecticut, Attn: Technical Library 1 Westinghouse Electric Corporation, P. 0. Box 284, Elmira, New York, Attn: Technical Library 1 Bendix Corporation, Red Bank Division, Eatontown, New Jersey, Attn: Dr. James Palmer 2 Scientific and Technical Information Facility Attn: NASA Representative (SAK/DL) P. 0. Box 5700 Bethesda, Maryland 20014

D~DO_____ ~~~UNCLASSIFIED DD UNCLASSIFIED DDll _ll The University of Michigan, Electron Physics Laboratory, l 1. Introduction The University of Michigan, Electron Physics Laboratory, 1. Introduction Ann Arbor, Michigan. RESEARCH AND DEVELOPMENT OF HIGH2- | 2. Work on Electrostatically Focused Ann Arbor, Michigan. RESEARCH AND DEVELOPMENT OF HIGH- 2. Work on Electrostatically Focused Arbor MichigaRN. FRTESR 1030 DEVELOPMENT OFAHGH- Guns POWER CRESTATRONS FOR THE 100-500 MC FREQUENCY RANGE, Guns POWER CRESTATRONS FOR THE 100-500 MC FREQUENCY RANGE, Gn by G. T. Konrad and C. K. Rhee. October, 1964, 19 pp. | 5. Work Conducted at the Bendix by G. T. Konrad and C. K. Rhee. October, 1964, 19 PP. 3. Work Conducted at the Bendix incl. illus. (Contract No. NObsr-81405, Project Serial l Research Laboratories incl. illus. (Contract No. NObsr-81403, Project Serial Research Laboratories N. SF100 201, Task No. 9294) 1. Su ry and Future Work No. SF0100 201, Task No. 9294) 4. Summary and Future Work I. Konrad, G. T. I. Konrad, G. T. The data obtained in a beam analyzer on a P, = 20 hollow- II. Rhee, C. K. The ata obtained in a beam analyzer of a P. = 20 hollow- II. Rhee, C. K. beam electron gun is presented. Certain defects in the l| beam electron gun is presented. Certain defects in the gun as well as the beam analyzer require that these data gun as well as the beam analyzer require that these data gu yeon.be redone. The final model of the 100-watt Crestatrons to be ~~~~~The final model of the l100-watt Crestatrons to be The final model of the 100-watt Crestatrons to be constructed on this program is described. Performance constructed on this program is described. Performance data and the required environmental tests were obtained ~~data and the required environmental tests were obtained data and the required environmental tests were obtained and are summarized in this report. On the basis of ~~~~and are summarized in this report. On the basis of and are summarized in this report. On the basis of these results construction of the three final tubes ~~~~these results construction of the three final tubes these results construction of the three final tubes appears to be warranted. ~~~~~~~~~~~~~~~~~~appears to be warranted. appears to be warranted. UNCLASSIFIED UNCLASSIFIED DD l_____ UNCLASSIFIED DD _ UNCLASSIFD The University of Michigan, Electron Physics Laboratory, 1. Introduction The University of Michigan, Electron Physics Laboratory, 1. Introduction. Micigan RESARCHAND EVELPMEN OF IGH-2. Work on Electrostatically Focused Ann Arbor, Michigan. RESEARCH AND DEVELOPMENT OF HIGH- 2. Work on Electrostatically Focused Ann Arbor, Michigan. RESEARCH AND DEVELOPMENT OF HIGH- 2. Work on Electrosttcally Focused ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~GunsWokoEetrsacayFoud POWER CRESTATRONS FOR THE 100-300 MC FREQUENCY RANGE, Guns POWER CRESTATRONS FOR THE 100-500 MC FREQUENCY RANGE, Guns by G. T. Konrad and C. K. Rhee. October, 1964, 19 pp. 3. Work Conducted at the Bendix by G. T. Konrad and C. K. Rhee. October, 1964, 19 PP. 5. Work Conducted at the Bendix incl. illus. (Contract No. NObsr-81403, Project Serial Research Laboratories incl. illus. (Contract No. NObsr-81405, Project Serial Research Laboratories No. SF0100 201, Task No. 9294) 4 ummary and Future Wor 4. Summary and Future Work T. Konrad, G. T. ~~~~~No. SF0100 201, Task No. 9294) 4. Summry and FutureWr No. 9294) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~I. Konrad, 0. T. I ord.1 The data obtained in a beam analyzer of a Pi = 20 hollow- II. Rhee, C. K. The ata obtained in a bea analyzer of a P = 20 hollow- I Konrad, G. T. ~~~~~~~i ~~~~~~~~~~~~The data obtained in a beam analyzer of a P~ 20 hollow- II. -Phee, C. K. beam electron gun is presented. Certain defects in the beam electron gun is presented. Certain defects in the gun as well as the bean analyzer require that these data gun as well as the beam analyzer require that these data be redone. gbe redone. The final model of the 100-watt Crestatrons to be The final model of the 0l0-watt Crestatrons to be constructed on this program is described. Performance constructed on this program is described. Performance data and the required environmental tests were obtained data and the required environmental tests were obtained and are summarized in this report. On the basis of and are summarized in this report. On the basis of these results construction of the three final tubes these results construction of the three final tubes appears to be warranted. appears to be warranted. UNCIASSIFI7ED UNCiASSIF.. D

DD________UNCLASSIFIED DD________UNCLASSIIE The University of Michigan, Electron Physics Laboratory, 1. Introduction The University of Michigan, Electron Physics Laboratory, 1. Introduction Ann Arbor, Michigan. RESEARCH AND DEVELOPMENT OF HIGH- 2. Work on Electrostatically Focused Ann Arbor, Michigan. RESEARCH AND DEVELOPMENT OF HIGH- 2. Work on Electrostaial-oue POWER CRESTATRONS FOR THE -100-300 MC FREQUENCY RANGE, Guns POWEN CRESTATRONS FOR TRE l00-500 MC FREQUJENCY RANGE, Guns by G. I. Konrad and C. K. Rhee. October, 1964, 19 pp. 5. Work Conducted at the Rendix by 0. T. Konrad and C. K. Rhee. October, 1964, 19 pp. 3. Work Conducted at h Bni incl. illus. (Contract No. NObsr-81403, Project Serial Hesearch Laboratories inc. illus. (Contract No. N~bsr-81405, Project Serial Research Laboratore No. SF0100 201, Task No. 9294) It. Suzmsary and Future Work No. SF0100 201, Task No. 9294) 4. Suamary and FutureWr I. Konrad, 0. T. The data obtained in a beam analyzer on a P Ohlo- II. Rhee, C. K. Th aaotie naba nlzro Ohlo-I. Konrad, 0. T. P 20 hollow- Th~~~~~~~~~~~~edamtelectronegu is prese nted.zertofai defct2i thelo- I.R.K bemeeto u speetd eti eet nte beam electron gun is presented. Certain defects in the gun as well as the bean analyzer -require that these data gun as well as the beam analyser require that these data be redone. be redone. The final model of the 100-watt Crestatrons to be The final model of the 100-watt Crestatrons to be constructed on this program is described. Performance constructed on this program is described. Performance data and the required environmental tests were obtained data and the required environmental tests were obtained and are summarized in this report. On the basis of and are summarized in this report. On the basis of these results construction of the three final tubes these results construction of the three final tubes appears to be warranted, appears to be warranted. UNCLASSIFIED UNCLASSIFIE GD________UNCLASSIFIED GD_______UCASFE The University of Michigan, Electron Physics Laboratory, 1. Introduction The University of Michigan, Electron Physics Laboratory,1.Itouin Ann Arbor, Michigan. RESEARCH AND DEVELOPMENT OF HIGH- 2. Work on Electrostatically Focused An roMcia.RSACHADDVLP1TO IH. WotrkondElctrosttclynoue POWER CRESTATRONS FOR IRE 100-300 MC FREQUENCY RANGE, Guns AnAbr ihgn EERHADDEEON FHG-2 oko lcrs by G. T. Konrad and C. K. Rhee. October, 16,19 pp. 5. Work Conducted at the Bendix POWER CRSTANIONS FOR THE 100-500 MC FREQUENCY RANGE., Guns inl.ilus (onrat o.N~sr810, roec Sril esa1964,raore by G. T. Konrad and C. K. Rhee. October, 1964, 19 pp. 5. Work Conducted at teBni Nci. tF00us.1 (oTract No. 92 sr914 5PojctSeia RSemarch LaborautoriesWr ci. illus. (Contract No. NObsr-814o3, Project Serial Research Laboratore No. SF0100 201, Task No. 9294). 4~~. Koamr~'and FuTur. Wr No. SF0100 201, Task No. 9294) 4. Summary and FutureWr The data obtained in a beam analyzer of a P 20 hollow- II. Rhee, C. K. I. Konrad, 0. T. p ~~~~~~~~~~~~~~~~~~~~~The data obtained in a beam analyzer of a P~ 20 hollow- II RheC.. beam electron gun is presented. Certain defects in the bemIletrn unihpesntd.CetindeecsKn.h gun asdowella. h enaaye eur httee t gun as well as the beam analyzer require that these data be redone. ~~~~~~~~~~~~~~~~~~~~~~~~~~be redone. The final model of the 100-watt Crestatrons to beThfiamoeofte10atCrstostob constructed on this program is described. Performance constructed on this program is described. Performance data and the required environmental tests were obtained data and the required environmental tests were obtained and are summarized in this report. On the basis of and are summarized in this report. On the basis of these results construction of the three final tubes these results construction of the three final tubes appears to be warranted. appears to be warranted. UNCIANSIFIED UNCLASSIFE

UNIVERSITY OF MICHIGAN 3II 9015 03466 2190