Properties of CsI(Tl) crystals and their optimization for calorimetry of high energy photons

Brose, J.; Dahlinger, G.; Schubert, K. R.

doi:10.1016/s0168-9002(98)00765-7

Cited by 20 publications

(11 citation statements)

References 12 publications

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“…One is a CsI(Tl) coupled to photodiode (PD) detectors that has been used to detect high energy gamma-rays. [3][4][5] The CsI(Tl)-PD detectors are more suitable because of their high stopping power, relatively low cost, and easy ability to be fabricated.…”

Section: Introductionmentioning

confidence: 99%

The Optimization of CsI(Tl)-PIN Photodiode for High-Energy Gamma-Ray Detection

Bai

2011

Progress in Nuclear Science and Technology

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A Monte Carlo simulation was performed to induce optimized parameters for CsI(Tl) crystals and large area PIN phohtodiode detectors for applications in high energy gamma ray spectroscopy. In order to derive the optimum parameters we used a Trade-Off procedure between the deposition energy and light transmission efficiency, while varying the detector thickness. Moreover, it was found that the surface treatment of the crystal in the photodiode is also an important factor for good light transmission. The tests were performed using a low noise charge-sensitive preamplifier and a pulse shape amplifier. Concerning the operating condition of the system, it is necessary to shape the time and reverse the bias voltage in order to provide another minimization of noise for the system. In order to maximize the light output from the crystal, the crystal geometry, crystal wrapping, optical bonding and matching to the PIN photodiode were all optimized. With a fixed crystal height of 5 cm, it was best to grind the sides and the top surface of the crystal on the front facing sides of the external reflectors, resulting in about a 14.5% enhancement compared with polishing all the sides and top.

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Section: Introductionmentioning

confidence: 99%

The Optimization of CsI(Tl)-PIN Photodiode for High-Energy Gamma-Ray Detection

Bai

2011

Progress in Nuclear Science and Technology

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“…and Preamplifier Assembly The photon detector consists of two 2 × 1 cm 2 silicon PIN diodes glued to a transparent 1.2 mmthick polysterene substrate that, in turn, is glued to the center of the rear face of the crystal by an optical epoxy [77] to maximize light transmission [78]. The surrounding area of the crystal face is covered by a plastic plate coated with white reflective paint [79].…”

Section: Photodiodesmentioning

confidence: 99%

“…The resulting signal distribution had a mean and rms width of 7300 and 890 photoelectrons/MeV, respectively; none of the crystals had a signal of less than 4600 photoelectrons/MeV [78,80].…”

Section: Photodiodesmentioning

confidence: 99%

The BABAR detector

Aubert¹,

Bazan²,

Boucham³

et al. 2002

Nuclear Instruments and Methods in Physics Research Section A:

1,415

703

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The BABAR Collaboration BABAR, the detector for the SLAC PEP-II asymmetric e + e − B Factory operating at the Υ (4S) resonance, was designed to allow comprehensive studies of CP -violation in B-meson decays. Charged particle tracks are measured in a multi-layer silicon vertex tracker surrounded by a cylindrical wire drift chamber. Electromagnetic showers from electrons and photons are detected in an array of CsI crystals located just inside the solenoidal coil of a superconducting magnet. Muons and neutral hadrons are identified by arrays of resistive plate chambers inserted into gaps in the steel flux return of the magnet. Charged hadrons are identified by dE/dx measurements in the tracking detectors and in a ring-imaging Cherenkov detector surrounding the drift chamber. The trigger, data acquisition and data-monitoring systems , VME-and network-based, are controlled by custom-designed online software. Details of the layout and performance of the detector components and their associated electronics and software are presented.

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“…The peak scintillation wavelength of CsI(Tl), around 550 nm, is well matched to the photodiode response. Reports in the literature on the optimisation of CsI(Tl) scintillator/ photodiode detector systems have shown that the coating of the scintillator in reflective layers gave optimum results [8,9].…”

Section: Gamma-ray Detector Arraymentioning

confidence: 99%