A radiation tolerant light pulser for particle physics applications Grummer, A.; Hoeferkamp, M.R.; Seidel, S.
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
03/2018, Letnik:
883, Številka:
C
Journal Article
Recenzirano
Odprti dostop
A light emitting diode (LED) pulser has been developed that can be used for tests or calibration of timing and amplitude sensitivity of particle physics detectors. A comparative study is performed on ...the components and pulser output characteristics before and after application of 800 MeV protons and cobalt-60 gammas. This device is demonstrated to be tolerant to fluences up to 6.7 × 1013 800-MeV-p/cm2 and gamma doses up to 5 Mrad.
Silicon detection is a mature technology for registering the passage of charged particles. At the same time it continues to evolve toward increasing radiation tolerance as well as precision and ...adaptability. For these reasons it is likely to remain a critical element of detection of systems associated with extraterrestrial exploration. Silicon sensor leakage current and depletion voltage depend on the integrated fluence received by the sensor and on its thermal history during and after the irradiation process. For minimal assumptions on shielding and hence on the particle energy spectrum, and using published data on Martian ground temperature, we predict the leakage current density and the depletion voltage, as a function of time, of silicon sensors in transit to and deployed continuously on the Mars surface for a duration of up to 28 Earth-years, for several sensor geometries and a worst-case temperature scenario.
Methods are developed for the application of forward biased p–i–n photodiodes to measurements of charged particle fluence beyond 1015 1-MeV-neutron-equivalent/cm2. An order of magnitude extension of ...the regime where forward voltage can be used to infer fluence is achieved for OSRAM BPW34F devices.
A radiation tolerant light pulser for particle physics applications Grummer, A.; Hoeferkamp, M. R.; Seidel, S.
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
11/2017, Letnik:
883, Številka:
C
Journal Article
Recenzirano
Odprti dostop
A light emitting diode (LED) pulser has been developed that can be used for tests or calibration of timing and amplitude sensitivity of particle physics detectors. Here a comparative study is ...performed on the components and pulser output characteristics before and after application of 800 MeV protons and cobalt-60 gammas. This device is demonstrated to be tolerant to fluences up to 6.7 x 1013 800-MeV-p/cm2 and gamma doses up to 5 Mrad.
The design of meter long flexible printed circuit cables required for low-mass ultra-high speed signal transmission in the high radiation environment of the High Luminosity Large Hadron Collider is ...described. The design geometry is a differential embedded microstrip with 100Ω nominal impedance. Minimal mass and maximal radiation hardness are pre-eminent considerations. Several dielectric materials are compared. To reduce mass, a cross hatched ground plane is applied. The long flexible printed circuit cables are characterized in bit error rate tests, attenuation versus frequency, mechanical response to temperature induced stress, and dimensional implications on radiation length. These tests are performed before and after irradiation with 1MeV neutrons to 2×1016/cm2 and 800MeV protons to 2×1016 1-MeV neutron equivalent/cm2. A 1.0m Kapton cable with cross hatched ground plane, effective bandwidth of 4.976 gigabits per second, 0.0160% of a radiation length, and no detectable radiation-induced mechanical or electrical degradation is obtained.
The effect of humidity on reverse breakdown in 3D silicon sensors McDuff, H.; Hoeferkamp, M.R.; Seidel, S. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
06/2015, Letnik:
785, Številka:
C
Journal Article
Recenzirano
Odprti dostop
The effect of humidity on reverse breakdown in silicon sensors of the “3D” geometry is studied for unirradiated and irradiated samples exposed to fluences relevant to the environment of the High ...Luminosity Large Hadron Collider. Leakage currents are measured and breakdown voltages are compared for a range of relative humidities and bias voltages. The proton beam at LANSCE, Los Alamos National Laboratory, was used to irradiate samples with 800MeV protons up to 2×1016p/cm2.
The effect of humidity on reverse breakdown in 3D silicon sensors McDuff, H.; Hoeferkamp, M. R.; Seidel, S. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
06/2015, Letnik:
785, Številka:
C
Journal Article
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