scholarly journals Use of the drift-time method to measure the electron lifetime in long-drift-length CdZnTe detectors

2016 ◽  
Vol 120 (10) ◽  
pp. 104507 ◽  
Author(s):  
A. E. Bolotnikov ◽  
G. S. Camarda ◽  
E. Chen ◽  
R. Gul ◽  
V. Dedic ◽  
...  
Keyword(s):  
Drift Time ◽  
Electron Lifetime ◽  
Drift Length ◽  
Cdznte Detectors

Direct Measurement of Electron Drift Parameters using Depth Sensing Single Carrier CdZnTe Detectors

1997 ◽  
Vol 487 ◽  
Author(s):  
Z. He ◽  
G. F. Knoll ◽  
D. K. Wehe ◽  
Y. F. Du
Keyword(s):  
Drift Time ◽  
Wide Band ◽  
High Energy ◽  
Digital Data ◽  
Depth Sensing ◽  
Single Carrier ◽  
Analysis System ◽  
Cdznte Detectors ◽  
Data Analysis System ◽  
Carrier Charge

AbstractThis paper describes some novel techniques developed for directly measuring the electron mobility μe and mean free drift time Te in wide band gap semiconductors. These methods are based on a newly-developed digital data analysis system, in conjunction with single carrier charge sensing and depth sensing techniques. Compared with conventional methods, the new techniques are easier to implement, do not involve curve fitting, allow the use of high energy γ-rays and are not sensitive to variations in pulse rise time.

Using the TOF method to measure the electron lifetime in long-drift CdZnTe detectors (Conference Presentation)

2016 ◽  
Author(s):  
Aleksey E. Bolotnikov ◽  
Giuseppe S. Camarda ◽  
Eric Chen ◽  
Yonggang Cui ◽  
Rubi Gul ◽  
...  
Keyword(s):  
Electron Lifetime ◽  
Cdznte Detectors

Drift Time Variations in CdZnTe Detectors Measured With Alpha Particles and Gamma Rays: Their Correlation With Detector Response

2013 ◽  
Vol 60 (2) ◽  
pp. 1189-1196 ◽  
Author(s):  
J. Butcher ◽  
M. Hamade ◽  
M. Petryk ◽  
A. E. Bolotnikov ◽  
G. S. Camarda ◽  
...  
Keyword(s):  
Gamma Rays ◽  
Drift Time ◽  
Alpha Particles ◽  
Detector Response ◽  
Time Variations ◽  
Cdznte Detectors

DELAYED COINCIDENCE AUGER ELECTRON LIFETIME MEASUREMENTS

1979 ◽  
Vol 40 (C1) ◽  
pp. C1-221-C1-222
Author(s):  
S. Schumann ◽  
I. A. Sellin ◽  
R. Mann ◽  
H. J. Frischkorn ◽  
D. Rosich ◽  
...  
Keyword(s):  
Auger Electron ◽  
Electron Lifetime ◽  
Lifetime Measurements

scholarly journals Charge Sharing and Charge Loss in High-Flux Capable Pixelated CdZnTe Detectors

Sensors ◽  
2021 ◽  
Vol 21 (9) ◽  
pp. 3260
Author(s):  
Kjell A. L. Koch-Mehrin ◽  
Sarah L. Bugby ◽  
John E. Lees ◽  
Matthew C. Veale ◽  
Matthew D. Wilson
Keyword(s):  
Carrier Transport ◽  
Hole Transport ◽  
Uniform Electric Field ◽  
Photon Flux ◽  
High Flux ◽  
Charge Sharing ◽  
Cdte Detector ◽  
Charge Loss ◽  
Cdznte Detectors ◽  
Detector Model

Cadmium zinc telluride (CdZnTe) detectors are known to suffer from polarization effects under high photon flux due to poor hole transport in the crystal material. This has led to the development of a high-flux capable CdZnTe material (HF-CdZnTe). Detectors with the HF-CdZnTe material have shown promising results at mitigating the onset of the polarization phenomenon, likely linked to improved crystal quality and hole carrier transport. Better hole transport will have an impact on charge collection, particularly in pixelated detector designs and thick sensors (>1 mm). In this paper, the presence of charge sharing and the magnitude of charge loss were calculated for a 2 mm thick pixelated HF-CdZnTe detector with 250 μm pixel pitch and 25 μm pixel gaps, bonded to the STFC HEXITEC ASIC. Results are compared with a CdTe detector as a reference point and supported with simulations from a Monte-Carlo detector model. Charge sharing events showed minimal charge loss in the HF-CdZnTe, resulting in a spectral resolution of 1.63 ± 0.08 keV Full Width at Half Maximum (FWHM) for bipixel charge sharing events at 59.5 keV. Depth of interaction effects were shown to influence charge loss in shared events. The performance is discussed in relation to the improved hole transport of HF-CdZnTe and comparison with simulated results provided evidence of a uniform electric field.

scholarly journals Space Charge Effects in Noble-Liquid Calorimeters and Time Projection Chambers

Instruments ◽  
2021 ◽  
Vol 5 (1) ◽  
pp. 9
Author(s):  
Sandro Palestini
Keyword(s):  
Space Charge ◽  
Scaling Laws ◽  
Relative Size ◽  
Design Solution ◽  
Space Charge Effects ◽  
Charge Effects ◽  
Time Projection Chambers ◽  
Drift Length ◽  
Calibration Methods ◽  
Time Projection

The subject of space charge in ionization detectors is reviewed, showing how the observations and the formalism used to describe the effects have evolved, starting with applications to calorimeters and reaching recent, large time-projection chambers. General scaling laws, and different ways to present and model the effects are presented. The relations between space-charge effects and the boundary conditions imposed on the side faces of the detector are discussed, together with a design solution that mitigates some of the effects. The implications of the relative size of drift length and transverse detector size are illustrated. Calibration methods are briefly discussed.

scholarly journals Quantum electron lifetime in GaAs quantum wells with three populated subbands

2015 ◽  
Vol 92 (15) ◽  
Author(s):  
Scott Dietrich ◽  
Jesse Kanter ◽  
William Mayer ◽  
Sergey Vitkalov ◽  
D. V. Dmitriev ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Electron Lifetime ◽  
Quantum Electron

A two-step deposition process for electrode fabrication of CdZnTe detectors

Vacuum ◽  
2012 ◽  
Vol 86 (7) ◽  
pp. 827-829 ◽  
Author(s):  
Kaifeng Qin ◽  
Linjun Wang ◽  
Jijun Zhang ◽  
Jiahua Min ◽  
Jian Huang ◽  
...  
Keyword(s):  
Deposition Process ◽  
Electrode Fabrication ◽  
Cdznte Detectors
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