Radiation tolerance of CVD diamond detectors for pions and protons

CVD diamond detectors are of interest for charged particle detection and tracking due to their high radiation tolerance. In this article we present, for the first time, beam test results from recently manufactured CVD diamond strip detectors and their behavior under low doses of electrons from a β-source and the performance before and after intense (> 10 15 /cm 2 ) proton-and pion-irradiations. We find that low dose irradiations increase the signal-to-noise ratio (pumping of the signal) and slightly deteriorate the spatial resolution. Intense irradiations with protons (2.2 × 10 15 p/cm 2 ) lowers the signal-to-noise ratio slightly. Intense irradiation with pions (2.9 × 10 15 π/cm 2 ) lowers the signal-to-noise ratio more. The spatial resolution of the diamond sensors improves after irradiations.corresponding author: Dirk.Meier@cern.ch Submitted to Elsevier

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“…Similar observations were recently made on diamond samples with circular contacts [13]. The reason for the contact damage is under study.…”

Section: Performance After Pion Irradiationsupporting

confidence: 81%

“…While experimental methods and results of pion irradiated diamond samples with large circular contacts can be found in references [11,12,1,13] we are reporting here results from the first pion irradiated diamond strip sensor. The irradiations were performed using 300 MeV/c pions (π +…”

Section: Performance After Pion Irradiationmentioning

confidence: 99%

Performance of irradiated CVD diamond micro-strip sensors

Adam

Berdermann

Bergonzo

et al. 2002

Nuclear Instruments and Methods in Physics Research Section A:

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“…Nevertheless, considering the extreme physical properties of diamond and the experimental data obtained from polycrystalline CVD diamond films [12], a sufficient high radiation dose tolerance is expected.…”

Section: Discussionmentioning

confidence: 99%

“…4 (right) the calibrated 1D spectrum is shown, where the left peak is the pulser line used to control the stability of the electronics, the intermediate one the 12 …”

Section: Mapping With Heavy-ion Micro Beamsmentioning

confidence: 99%

Single Crystal CVD Diamond Detectors for Hadron Physics

Pomorski¹,

Berdermann²,

Ciobanu³

et al. 2006

Astroparticle, Particle and Space Physics, Detectors and Medical Physics Applications

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We report on characterization of several single crystals CVD diamond detectors tested for the use in heavy-ion spectrometry and minimum ionizing particles time of flight measurements. An energy resolution of 16 keV (FWHM) is achieved using a 241 Am α-source, which is comparable to the energy resolution of silicon detectors. The collected charge maps, measured using 12 C micro beams confirm the excellent homogeneity of the novel material. Using low impedance broadband electronics and a transient-current technique the mobility and saturation drift velocity of electrons and holes are estimated.

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“…scintillators or silicon detectors) to satisfy those requirements. Whereas, the diamond based detector can fulfill them due to its strong radiation tolerance and the fast time response [3]. Recently, the prototype diamond detector consists of ultra low-mass materials to install inside the J-PARC MR beam-line was newly developed and the direct proton beam measurement was conducted.…”

Section: Introductionmentioning

confidence: 99%

Development of the Diamond based Proton Beam Monitor for COMET Experiment

Fujii

2018

Proceedings of the European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2017)

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The COMET experiment searches for the muon-to-electron(µ-e) conversion with a sensitivity below 10 −16 which is 10,000 times better than the present upper limit. This process is strictly forbidden in the standard model because of the lepton flavor conservation law. In contrast, its branching ratio can be sizable around 10 −15 in many models of physics beyond the standard model (BSM). Therefore the discovery of the µ-e conversion should be unambiguous evidence of BSM. Since sufficient amount of muons can be collected owing to the world most powerful pulsed proton beam at J-PARC, the background suppression is the most important to achieve the target sensitivity. In COMET, the measurement will be done between 500-1000 ns after coming the beam bunch to highly suppress the beam related prompt background. Even in this case, signals can be detected because of muon's long life time (τ µ ∼ 800 ns) in a muonic-atom in case of using aluminum. In this scheme, the "extinction factor", (≡(#of residual protons between two bunches)/(#of protons in a bunch)), must be less than 10 −9 . To ensure such an extremely low extinction factor during the data taking, an innovative diamond detector will be adopted since it has high radiation tolerance to an intensive proton beam, and a fast time response to identify a single proton after the prompt beam. Recently, a prototype detector was developed based on a single-crystal diamond with a metal-insulator-metal type structure to perform the direct proton measurement inside the abort beam-line of J-PARC main ring. The installation was completed in this Spring and the direct beam measurement was conducted with the high intensity pulsed proton beam and the low intensity continuous beam. In this paper, results of above measurements are reported together with prospects.

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Radiation tolerance of CVD diamond detectors for pions and protons

Cited by 32 publications

References 4 publications

Performance of irradiated CVD diamond micro-strip sensors

Performance of irradiated CVD diamond micro-strip sensors

Single Crystal CVD Diamond Detectors for Hadron Physics

Development of the Diamond based Proton Beam Monitor for COMET Experiment

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