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Volume 281 - The 26th International Nuclear Physics Conference (INPC2016) - New Facilities and Instrumentation – Tuesday 13
The Performance Of The Scrit Detectors For Electron-RI Scattering Experiment
A. Enokizono,* K. Adachi, T. Fujita, M. Hara, M. Hori, T. Hori, S.i. Ichikawa, K. Kasama, K. Kurita, K. Namba, T. Ohnishi, S.n. Sasamura, T. Suda, T. Tamae, K. Tsukada, M. Togasaki, N. Uchida, M. Wakasugi, S. Wang, M. Watanabe, K. Yamada
*corresponding author
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Pre-published on: 2017 May 04
Published on: 2017 May 09
The SCRIT (Self-Confining RI Ion Target) facility has been constructed at RIKEN to make the electron-RI scattering experiment possible for the first time in the world. At SCRIT, the angular momentum distribution of scattered electrons is measured by WiSES (Window-frame Spectrometer for Electron Scattering) which consists of a dipole magnet and front/rear drift chambers, covering a solid angle of $\sim$80 mSr with an intrinsic momentum resolution of $\Delta p/p\sim10^{-3}$. Also the luminosity of the electron-RI scattering is estimated from bremsstrahlung photons measured by LMon (Luminosity Monitor) to obtain the absolute cross-section of the scattering. The LMon consists of a CsI calorimeter to measure the photon energy, and plastic fiber scintillators to measure the 2D hit distribution of the bremsstrahlung photons. In 2015-2016 the first physics experiment has been performed using $^{132}\rm Xe$ target, then the luminosity and angular distributions were successfully measured at the electron beam energy of 150-300 MeV, achieving a luminosity above $10^{27}cm^{-2}$s$^{-1}$. In this article, we present the performances of the WiSES and LMon detectors obtained by using the $^{132}\rm Xe$ experiment data.
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