ترجمه مقاله نقش ضروری ارتباطات 6G با چشم انداز صنعت 4.0
- مبلغ: ۸۶,۰۰۰ تومان
ترجمه مقاله پایداری توسعه شهری، تعدیل ساختار صنعتی و کارایی کاربری زمین
- مبلغ: ۹۱,۰۰۰ تومان
ABSTRACT
A transmittance monitor has been developed for the second tagged-photon beamline at the Research Center for Electron Photon Science, Tohoku University, Japan. In this beamline, an internal radiator is employed to produce the bremsstrahlung photon beam out of circulating electrons in a synchrotron. The transmittance, which is defined as the probability of finding a photon coming to the target position when an electron is detected with a photon-tagging counter, should be determined to deduce cross sections for photo-induced reactions. The developed monitor consists of a telescope of thin plastic scintillators with a positron and electron converter, and a dedicated circuit implemented in a field-programmable gate array chip. The transmittance can be measured with this monitor for high-intensity photon beams corresponding to 20 MHz tagging signals. The measured transmittance is found to be constant with respect to the photon intensity for each photon-tagging channel.
4. Summary
A photon-transmittance monitor has been developed for the second tagged-photon beamline at ELPH. The developed monitor consists of a telescope of thin plastic scintillators with an ? +? − converter, and a dedicated circuit implemented in an FPGA-based logic module. The transmittance, ?? , can be obtained from the response probability of the detector, ?? , and sampling ratio (the probability of ? +? − production with the converter), ?? . The ?? is determined using faint beams by comparing the ?? and directly measured ?? with an EMC module. The ?? is found to be 0.00665±0.00017(sta.)±0.00015(sys.). The ?? can be successfully measured with this monitor for high-intensity photon beams corresponding to 20 MHz tagging signals. The measured ?? is found to be constant with respect to the photon intensity for each photon-tagging channel within the statistical error (approximately ±5%). This suggests that ?? is constant independently of the circulating current. The accuracy of the transmittance measured at high intensity is expected to be ±5% owing to the uncertainty of ?? .