Instrumentation for sFLASH


研究成果: Conference article同行評審


We will report on the setup and calibration of the instrumentation for sFLASH. The sFLASH experiment is a measurement of the air fluorescence from ∼1021 eV artificial air showers developed in an alumina target by an electron beam provided from End Station A of the Stanford Linear Accelerator Center (SLAC). sFLASH employs Photomultiplier tubes (PMTs) to detect the fluorescence photons and an Integrating Charge Transformer (ICT) to measure the beam current. The PMTs are positioned ∼10m perpendicular to shower axis are used to measure the air fluorescence photons. The absolute gain of the PMTs was measured using CRAYS at the Institute of Cosmic-Ray Research, Japan. CRAYS is a PMT photo-gain calibration system consisting of a vessel containing nitrogen gas and a 14μJ nitrogen (337.1 nm) laser. The gain of each PMT was monitored during the course of the experiment using a YAP puiser (YAIO: Ce + 241Am) potted into an ultraviolet optical filter attached to the surface of the PMT window. We expect to achieve an overall experimental uncertainly of ∼6%. The ICT (Bergoz) consists of 20 turns of coil to measure the beam current. In sFLASH experiment we set it ∼1 m away from beam exit to measure the beam current just prior to entering the target material. The ICT was calibrated with 2 ns pulse generator at Jet Propulsion Laboratory. The calibration uncertainty of the ICT is ∼1%.

期刊Proceedings of Science
出版狀態Published - 2017
事件35th International Cosmic Ray Conference, ICRC 2017 - Bexco, Busan, Korea, Republic of
持續時間: 10 七月 201720 七月 2017

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