Now showing items 1-9 of 9
Granite, a new very high energy gamma-ray telescope
(Elsevier, 1990-03)
A international collaboration of astrophysicists plan to construct a new 10-meter diameter gamma-ray Cerenkov telescope at the Whipple Observatory on Mt. Hopkins in Arizona. By operatin in coincidence with the original ...
Curvature and flatness in a Brans-Dicke universe
(Elsevier, 1994-06-27)
The evolution of a universe with Brans-Dicke gravity and nonzero curvature is investigated here. We find solutions to the equations of motion during the radiation dominated era. In a Friedman-Robertson-Walker cosmology we ...
Characterization and radiation testing of the Harris HS9008RH flash analogue to digital converter
(Elsevier, 1994-06-15)
Results from tests characterizing the performance and radiation hardness of the HS9008RH flash analog to digital convertor (FADC) are presented. These tests were performed primarily to evaluate the suitability of this ...
CAMAC modules for recording arbitrarily long time series
(Elsevier, 1992-08-15)
Two CAMAC modules have been designed to record the time of arrival of up to 32768 sequential events. the system consists of a clock module to generate a gated clock pulse train and a memory module to record event arrival ...
Mirrors for an imaging gamma ray telescope
(Elsevier, 1991-12-15)
A method is given for making mirrors suitable for large parabolic light collectors. The present application is for collecting Cherenkov light from air showers.
A large air shower array to search for astrophysical sources emitting [gamma]-rays with energies >=1014 eV
(Elsevier, 1994-07-15)
We describe the technical details and the performance of a large array which detects both the electron and muon components in extensive air showers with energies >= 1014 eV. The array was designed to search for [gamma]-rays ...
GRACE: a prototype for the Gran Sasso air Cherenkov experiment
(Elsevier, 1992-10-15)
GRACE is a five element array of air Cherenkov light collectors designed to measure the energy of primary cosmic rays and operate on the terrain over the deep underground muon tracking detector, MACRO, at the Gran Sasso ...
An inexpensive circuit for monitoring photomultiplier anode current
(Elsevier, 1992-01-01)
An 8-channel current-to-frequency converter module has been developed for measuring photomultiplier anode currents in the range of 1-100 [mu]A. Although this circuit was designed specifically for monitoring photomultiplier ...
An amplifier-discriminator module for very high energy [gamma]-ray astronomy
(Elsevier, 1990-07-15)
An eight-channel amplifier-discriminator module has been developed for processing fast photomultiplier signals from a ground-based [gamma]-ray imaging telescope. The module provides several outputs for recording pulse ...