Development of a Portable Charge Integration Embedded DAQ Board for Beam Monitoring

Abstract

We have developed an embedded Data AcQuisition (DAQ) board which has an Ethernet controller and a charge integrator. We could monitor the beam pro le outside the beam line by using this system with an Ethernet connection. This embedded DAQ board consists of a microcontroller a network controller, eld programmable gate array (FPGA) and a currentstodigital converter with a wide dynamic range, a variable integration time and a 20-bit resolution. The board was tested with a proton beam by using the MC-50 cyclotron at the Korea Institute of Radiological and Medical Sciences. The board was connected to a homemade ion-chamber and it took the currents signal from the ion-chamber directly. The signals were integrated by using the charge integration function of the board. The data were recorded through the Ethernet connection by using a personal computer. We monitored the beam condition with di erent beam currents from 1 nA to 10 nA We could successfully measure the dose of the 45-MeV proton beam with various beam currents by using this charge integration embedded DAQ board.