ELECTRICAL PROPERTIES OF CVD DIAMOND DETECTOR AND DETECTION FOR ALPHA PARTICLE

The outstanding properties of diamond make it an ideal material for radiation detectors especially in the high temperature, high radiation and corrosion environments. For this purpose, electrical and irradiation properties of high quality CVD diamond detector were investigated at room temperature under irradiation conditions. For freestanding diamond films, dark current was in the order of 10-10 A and photocurrent was in the order of 10-8 A by 5.9 keV X-ray irradiation from a 55 Fe source with the applied voltage of 40 V. Pulse height spectrum acquired using a 241 Am alpha particle source show a full-energy peak at 820 channel which corresponded to an average charge collection efficiency of approximately 40.5%. However, a good signal-to-noise ratio and an energy resolution of 1.33% for alpha particles detecting were also obtained.

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Charge-collection efficiency and long-term stability of single-crystal CVD diamond detector under different carrier-drift conditions

Japanese Journal of Applied Physics ◽

10.7567/jjap.55.046401 ◽

2016 ◽

Vol 55 (4) ◽

pp. 046401 ◽

Cited By ~ 2

Author(s):

Yuki Sato ◽

Hiroyuki Murakami ◽

Takehiro Shimaoka ◽

Masakatsu Tsubota ◽

Junichi H. Kaneko

Keyword(s):

Single Crystal ◽

Collection Efficiency ◽

Cvd Diamond ◽

Charge Collection ◽

Diamond Detector ◽

Charge Collection Efficiency ◽

Long Term Stability ◽

Drift Conditions ◽

Cvd Diamond Detector

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Charge-collection efficiency of single-crystal CVD diamond detector for low-energy charged particles with energies ranging from 100 keV to 2 MeV

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment ◽

10.1016/j.nima.2016.08.020 ◽

2016 ◽

Vol 834 ◽

pp. 218-222 ◽

Cited By ~ 3

Author(s):

Yuki Sato ◽

Hiroyuki Murakami ◽

Takehiro Shimaoka ◽

Masakatsu Tsubota ◽

Junichi H. Kaneko

Keyword(s):

Single Crystal ◽

Collection Efficiency ◽

Charged Particles ◽

Cvd Diamond ◽

Low Energy ◽

Charge Collection ◽

Diamond Detector ◽

Charge Collection Efficiency ◽

Cvd Diamond Detector

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CVD Diamond Thin Films for Alpha Particle Detector Application

MRS Proceedings ◽

10.1557/proc-692-h9.32.1 ◽

2001 ◽

Vol 692 ◽

Author(s):

S. G. Wang ◽

Q. Zhang ◽

S. F. Yoon ◽

J. Ahn

Keyword(s):

Thin Films ◽

Alpha Particle ◽

Collection Efficiency ◽

Cvd Diamond ◽

Average Charge ◽

Particle Detector ◽

Detector Performance ◽

Characteristic Energy ◽

Charge Collection Efficiency ◽

Diamond Thin Films

AbstractIn this paper, CVD diamond thin films for alpha particle detector have been prepared using hot-filament chemical vapor deposition (HFCVD) technique. Alpha particle detectors with coplanar and sandwich electrode geometry have been fabricated on the diamond films using liftoff technology. The detector performance has been tested using a 241 Am source with a characteristic energy of 5.5 MeV. An average charge collection efficiency of 32 % for the detector with coplanar and of 21 % for the detector with sandwich geometry is obtained.

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Pulse height reduction effects of single-crystal CVD diamond detector for low-energy heavy ions

EPL (Europhysics Letters) ◽

10.1209/0295-5075/104/22003 ◽

2013 ◽

Vol 104 (2) ◽

pp. 22003 ◽

Cited By ~ 7

Author(s):

Y. Sato ◽

T. Shimaoka ◽

J. H. Kaneko ◽

H. Murakami ◽

D. Miyazaki ◽

...

Keyword(s):

Single Crystal ◽

Heavy Ions ◽

Pulse Height ◽

Cvd Diamond ◽

Low Energy ◽

Diamond Detector ◽

Height Reduction ◽

Cvd Diamond Detector

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Minimum Ionizing Particle Detector Based on p+n Junction SiC Diode

Materials Science Forum ◽

10.4028/www.scientific.net/msf.527-529.1469 ◽

2006 ◽

Vol 527-529 ◽

pp. 1469-1472 ◽

Cited By ~ 1

Author(s):

Francesco Moscatelli ◽

Andrea Scorzoni ◽

Antonella Poggi ◽

Mara Bruzzi ◽

Stefano Lagomarsino ◽

...

Keyword(s):

Collection Efficiency ◽

Pulse Height ◽

Pulse Height Spectrum ◽

Reverse Voltage ◽

Charge Collection Efficiency ◽

Polarization Effects ◽

The Moment ◽

Two Peaks ◽

Bias Point ◽

Ion Implanted

In this work ion-implanted p+/n diodes have been used as minimum ionizing particle (MIP) detectors. The diode structure is based on a 0.45 $m deep, NA = 4×1019 cm-3 doped p+ anode, ion implanted in an n-type epilayer with thickness equal to 55 $m and nominal donor doping ND = 2×1014 cm-3. The diode breakdown voltages were above 1000V. At 1000V reverse bias the diode leakage current was of the order of 1 nA. The punch through depletion voltage was nearing the range 220-250 V. The charge collection efficiency to minimum ionizing particle was investigated by a 90Sr β source. The pulse height spectrum was measured as a function of the reverse voltage in the range 0-605 V. At each bias point the signal was stable and reproducible, showing the absence of polarization effects. At 220 V the collected charge was 2970 e- and saturated at 3150 e- near 350 V. At the moment, this is the highest collected charge for SiC detectors. At bias voltages over 100V the spectrum was found to consist of two peaks clearly separated. Around 250 V the signal saturates, in agreement with CV results.

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Pulse height decrease in a single-crystal CVD diamond detector under gold ion beam bombardment

Japanese Journal of Applied Physics ◽

10.7567/jjap.54.096401 ◽

2015 ◽

Vol 54 (9) ◽

pp. 096401 ◽

Cited By ~ 2

Author(s):

Yuki Sato ◽

Hiroyuki Murakami

Keyword(s):

Single Crystal ◽

Ion Beam ◽

Pulse Height ◽

Cvd Diamond ◽

Diamond Detector ◽

Gold Ion ◽

Cvd Diamond Detector

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CHARACTERISTICS OF CVD DIAMOND FILMS IN DETECTING UV, X-RAY AND ALPHA PARTICLE

International Journal of Modern Physics B ◽

10.1142/s0217979202010798 ◽

2002 ◽

Vol 16 (06n07) ◽

pp. 1018-1023 ◽

Cited By ~ 1

Author(s):

J. AHN ◽

B. GAN ◽

Q. ZHANG ◽

S. F. YOON ◽

V. LIGATCHEV ◽

...

Keyword(s):

Visible Light ◽

Alpha Particle ◽

Uv Light ◽

Collection Efficiency ◽

Ion Beam ◽

Response Speed ◽

Cvd Diamond ◽

Charge Collection ◽

Charge Collection Efficiency ◽

X Ray

The CVD diamond UV photodetector shows more than four orders of photoresponsivity discrimination between UV and visible light. Post-treatment on as-fabricated photodetector is essential for a good response to UV light and blindness to visible light. The CVD diamond X-ray detector shows linear dependence of photocurrent on X-ray intensity and high response speed. The mapping of charge collection efficiency on the whole sensing area of a CVD diamond alpha particle detector has been obtained using ion-beam-induced charge microscopy technique. Three peaks have been observed in the charge collection spectrum.

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Comparative Studies of Ionizing Radiation Detectors Made on the Basis of Various Types of Diamond Plates

Nano- i Mikrosistemnaya Tehnika ◽

10.17587/nmst.23.68-75 ◽

2021 ◽

Vol 23 (2) ◽

pp. 68-75

Author(s):

Altukhov A.A. ◽

Keyword(s):

Ionizing Radiation ◽

Single Crystal ◽

Comparative Studies ◽

Collection Efficiency ◽

Radiation Detectors ◽

Charge Collection ◽

Alpha Radiation ◽

Charge Collection Efficiency ◽

Polarization Phenomena

The results of experiments on the study of polarization phenomena and the charge collection efficiency in test structures of diamond ionizing radiation detectors using diamond plates of various types, including single-crystal NRNT-type, single-crystal CVD-type, as well as polycrystalline type, when exposed to alpha-radiation with an energy of 5.5 MeV are presented. Studies have demonstrated the existence of a number of problems with the device quality of diamond plates that affect the performance of spec-trometric-type detectors.

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