A large double scatter telescope for gamma rays and neutrons

Herzo, D.; Koga, R.; Millard, W. A.; Moon, S.; Ryan, J. M.; Wilson, Robert B.; Zych, A. D.; White, R. S.

doi:10.1016/0029-554x(75)90215-3

Cited by 67 publications

(24 citation statements)

References 17 publications

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“…The development of Compton telescopes began in the 1970's, with work done at the Max Planck Institut (Schönfelder et al 1973), University of California, Riverside (Herzo et al 1975), and the University of New Hampshire (Lockwood et al 1979), culminating in the design and flight of COMPTEL/CGRO. These historical Compton telescopes consist of two scintillation detector planes -a low atomic number "converter" and a high atomic number "absorber".…”

Section: Send Offprint Requests To: Se Boggsmentioning

confidence: 99%

Event reconstruction in high resolution Compton telescopes

Boggs¹,

Jean

2000

Astron. Astrophys. Suppl. Ser.

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Abstract. The development of germanium Compton telescopes for nuclear γ-ray astrophysics (∼ 0.2 − 20 MeV) requires new event reconstruction techniques to accurately determine the initial direction and energy of photon events, as well as to consistently reject background events. This paper describes techniques for event reconstruction, accounting for realistic instrument/detector performance and uncertainties. An especially important technique is Compton Kinematic Discrimination, which allows proper interaction ordering and background rejection with high probabilities. The use of these techniques are crucial for the realistic evaluation of the performance and sensitivity of any germanium Compton telescope configuration.

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Section: Send Offprint Requests To: Se Boggsmentioning

confidence: 99%

Event reconstruction in high resolution Compton telescopes

Boggs¹,

Jean

2000

Astron. Astrophys. Suppl. Ser.

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“…The use of the technique of the Compton telescope seems to be the only way for the detection of MeV γ-rays. The development of the technique began in 1970s in order to explore the γ-ray universe in this energy band [1], [2]. The COMPTEL instrument on-board the CGRO satellite, which was launched in 1991, achieved pioneering results with this technique [3].…”

Section: Introductionmentioning

confidence: 99%

A prototype Si/CdTe Compton camera and the polarization measurement

Mitani

Tanaka

Nakazawa

et al. 2004

IEEE Trans. Nucl. Sci.

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Abstract-A Compton camera is the most promising approach for gamma-ray detection in the energy region from several hundred keV to MeV, especially for application in high energy astrophysics. In order to obtain good angular resolution, semiconductor detectors such as silicon, germanium and cadmium telluride(CdTe) have several advantages over scintillation detectors, which have been used so far. Based on the recent advances of high resolution CdTe and silicon imaging detectors, we are working on a Si/CdTe Compton camera. We have developed 64-pixel CdTe detectors with a pixel size of 2 mm×2 mm and double-sided Si strip detectors(DSSDs) with a position resolution of 800µm. As a prototype Si/CdTe Compton camera, we use a DSSD as a scatterer and two CdTe pixel detectors as an absorber. In order to verify its performance, we irradiate the camera with 100% linearly polarised 170 keV γ-rays and demonstrate the system works properly as a Compton camera. The resolution of the reconstructed scattering angle is 22• (FWHM). Measurement of polarization is also reported. The polarimetric modulation factor is obtained to be 43%, which is consistent with the prediction of Monte Carlo simulations.

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“…In many cases, a time of flight measurement is made between the upper and lower detector. Earlier detectors of this type include those of Sch~Snfelder et aL (1973), Herzo et al (1975), and Lockwood et al (1981). Collimators have been used in a few cases to further restrict the solid angle (Baker etal., 1979;Hartman et aL, 1984).…”

Section: The Compton Interaction Regionmentioning

confidence: 99%

Instrumentation for gamma-ray astronomy

1988

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There are three distinct energy ranges within the broad spectrum of gamma-ray astronomy, low energy (which in turn is subdivided), high energy, and very high and ultra-high energy. Each has its own unique type of instrumentation. Only in the very high-energy range do the telescopes bear any resemblence to optical telescopes; the rest appear more like instrumentation for high-energy physics. The low-and high-energy ranges are now primarly dependent on spaceflight, although some balloon altitude research is still being accomplished. Satellites planned to be launched in the next two years will carry telescopes with considerably more capability than those previously flown in space. In the very high and ultra-high energy realm, large ground based systems are used to detect the secondary radiation from interactions of the gamma radiation with the air. In all cases, software and data analysis are becoming increasingly important aspects of the subject as the data become ever greater and more complex. Beyond the telescopes to be flown in space or installed on the ground soon, instrumentation, taking advantage of new detector techniques which have come into being or older ones which now seem capable of being adapted to space, are being developed for the more distant future.

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A large double scatter telescope for gamma rays and neutrons

Cited by 67 publications

References 17 publications

Event reconstruction in high resolution Compton telescopes

Event reconstruction in high resolution Compton telescopes

A prototype Si/CdTe Compton camera and the polarization measurement

Instrumentation for gamma-ray astronomy

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