MiniPIX Timepix3 Flex探测器表征的FLASH电子束中产生的杂散辐射
Stray radiation produced in FLASH electron beams characterized by the MiniPIX Timepix3 Flex detector
摘要：
本工作的目的是表征超高剂量率脉冲（UHDpulse）电子束使用混合半导体像素探测器。采用Timepix 3（TPX 3）ASIC芯片测量了15 ~ 23 MeV脉冲电子束次级辐射场的成分、空间、时间和光谱特性。面临的挑战是开发一个单一的紧凑型探测器，可以提取光谱和剂量测定信息，这样的高通量短脉冲场。对于二次射束测量，将1和8 cm厚的PMMA板放置在电子束前面，脉冲持续时间为3.5微秒。将具有100和500微米厚度的硅传感器的Timepix 3检测器放置在移动台上，允许在射束轴的各个横向位置处进行数据采集。在FLEXI配置中使用探测器可以实现适当的原位测量和最小的自屏蔽。初步结果突出了技术和探测器的能力，以测量个人UHD脉冲的电子束在短脉冲。此外，每个像素的两个信号链的使用使得能够在混合辐射场中在离射束核心的各种距离处估计粒子通量和散射剂量率（DR）。
英文摘要：
This work aims to characterize ultra high dose rate pulses (UHDpulse) electron beams using the hybrid semiconductor pixel detector. The Timepix3 (TPX3) ASIC chip was used to measure the composition, spatial, time, and spectral characteristics of the secondary radiation fields from pulsed 15 to 23 MeV electron beams. The challenge is to develop a single compact detector that could extract spectrometric and dosimetric information on such high flux short pulsed fields. For secondary beam measurements, PMMA plates of 1 and 8 cm thickness were placed in front of the electron beam, with a pulse duration of 3.5 microseconds. Timepix3 detectors with silicon sensors of 100 and 500 micrometers thickness were placed on a shifting stage allowing for data acquisition at various lateral positions to the beam axis. The use of the detector in FLEXI configuration enables suitable measurements in situ and minimal self shielding. Preliminary results highlight both the technique and the detector's ability to measure individual UHDpulses of electron beams delivered in short pulses. In addition, the use of the two signal chains per pixel enables the estimation of particle flux and the scattered dose rates (DRs) at various distances from the beam core, in mixed radiation fields.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
