Total Energy Monitor

Friedrich, S

关键词: ABSORPTION;    COMMISSIONING;    DESIGN;    MONITORS;    PHYSICS;    SILICON;    SPECIFICATIONS;   

DOI  :  10.2172/945556
RP-ID  :  LLNL-TR-406937
PID  :  OSTI ID: 945556
Others  :  TRN: US0901213

美国|英语

来源: SciTech Connect

【 摘 要 】

The total energy monitor (TE) is a thermal sensor that determines the total energy of each FEL pulse based on the temperature rise induced in a silicon wafer upon absorption of the FEL. The TE provides a destructive measurement of the FEL pulse energy in real-time on a pulse-by-pulse basis. As a thermal detector, the TE is expected to suffer least from ultra-fast non-linear effects and to be easy to calibrate. It will therefore primarily be used to cross-calibrate other detectors such as the Gas Detector or the Direct Imager during LCLS commissioning. This document describes the design of the TE and summarizes the considerations and calculations that have led to it. This document summarizes the physics behind the operation of the Total Energy Monitor at LCLS and derives associated engineering specifications.