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Large area PPAC development at the Rare Isotope Science Project
Akers, Charles,Lee, Kwang Bok,Kim, Young Jin,Hashimoto, Takashi,Kim, Eun Hee,Lee, Hyo Sang,Park, Jin Hyung,Ryu, Min Sang,Tshoo, Kyoungho,Kang, Byoung Hwi,Kwon, Young Kwan Elsevier 2018 Nuclear Instruments & Methods in Physics Research. Vol.910 No.-
<P><B>Abstract</B></P> <P>Large area position sensitive parallel plate avalanche counters (PPACs) have been fabricated for the Rare Isotope Science Project. These detectors have active areas of 20 × 20 cm<SUP>2</SUP> and 40 × 20 cm<SUP>2</SUP>, and utilize a stripped electrode structure, together with a delay-line readout, to extract position information. The 20 × 20 cm<SUP>2</SUP> detector performance was tested with 3 MeV/u <SUP>12</SUP>C and <SUP>16</SUP>O beams. A position resolution better than 1 mm, full width at half maximum, and a detection efficiency of 94% were measured with an incident beam intensity of 2 × 10<SUP>6</SUP> particles per second. A new production technique, using photolithography, that makes the fabrication of stripped PPAC electrodes larger in area than was previously possible, is also presented.</P>
Construction and Performance Test of Prototype Parallel Plate Avalanche Counters at RAON
Charles Akers,이광복,김영진,김은희,권영관,이효상,문전영,박진형,류민상,신택수,Satou Yoshiteru 한국물리학회 2017 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.70 No.7
Two prototype position sensitive parallel plate avalanche counters (PPACs) have been fabricated at the Rare Isotope Science Project (RISP). Both detectors have active areas of 10 × 10 cm2 and utilize a stripped electrode structure, together with a delay line readout, to extract position information. Testing was conducted with an 241Am source, and 2-dimensional position information was obtained. A position resolution of 0.55 mm full width at half maximum (FWHM), together with a position linearity of ±55 μm over a 67-mm detection range, were measured. A time resolution of 450 ps (FWHM) was also measured.