New μSR spectrometer at J-PARC MUSE based on Kalliope detectors

13th International Conference on Muon Spin Rotation, Relaxation and Resonance

Kojima, K.M.^1,2,7 ; Murakami, T.^3,7 ; Takahashi, Y.^1,7 ; Lee, H.^1,7 ; Suzuki, S.Y.^4,7 ; Koda, A.^1,2,7 ; Yamauchi, I.^1 ; Miyazaki, M.^1 ; Hiraishi, M.^1 ; Okabe, H.^1 ; Takeshita, S.^1 ; Kadono, R.^1,2,7 ; Ito, T.^5 ; Higemoto, W.^5 ; Kanda, S.^3,6,7 ; Fukao, Y.^3,7 ; Saito, N.^3 ; Saito, M.^3,7 ; Ikeno, M.^3,7 ; Uchida, T.^3,7 ; Tanaka, M.M.^3,7

Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK-IMSS), J-PARC Material and Life Science Experimental Facility (J-PARC MLF), Tsukuba and Tokai Ibaraki

319-1195, Japan^1

Department of Materials Structure Science, Graduate University for Advanced Studies, Tsukuba, Ibaraki

305-0801, Japan^2

Institute of Particle and Nuclear Study, High Energy Accelerator Research Organization (KEK-IPNS), Ibaraki, Tsukuba, Japan^3

Computing Research Center, High Energy Accelerator Research Organization (KEK-CRC), Tsukuba, Ibaraki

305-0801, Japan^4

Advanced Science Research Center, Japan Atomic Energy Agency (JAEA), Tokai, Ibaraki

319-1195, Japan^5

University of Tokyo, Graduate School of Science, Hongo

113-8654, Japan^6

Open Source Consortium of Instrumentation, Open-it, KEK, Tsukuba, Ibaraki

305-0801, Japan^7

关键词: Data accumulation;    Detector systems;    Field programmables;    Longitudinal fields;    Multi-pixel;    Muon spin relaxation;    Transfer technologies;    User programs;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/551/1/012063/pdf
DOI  :  10.1088/1742-6596/551/1/012063

来源: IOP

【 摘 要 】

We developed a new positron detector system called Kalliope, which is based on multi-pixel avalanch photo-diode (m-APD), application specific integrated circuit (ASIC), field programmable gated array (FPGA) and ethernet-based SiTCP data transfer technology. We have manufactured a general-purpose spectrometer for muon spin relaxation (μSR) measurements, employing 40 Kalliope units (1280 channels of scintillators) installed in a 0.4 T longitudinal-field magnet. The spectrometer has been placed at D1 experimental area of J- PARC Muon Science Establishment (MUSE). Since February of 2014, the spectrometer has been used for the user programs of MUSE after a short commissioning period of one week. The data accumulation rate of the new spectrometer is 180 million positron events per hour (after taking the coincidence of two scintillators of telescopes) from a 20×20 mm sample for double-pulsed incoming muons.