Development of a Portable Charge Integration Embedded DAQ Board for Beam Monitoring
J. Korean Phy. Soc. 2009; 54: 2088~2092
Published online May 15, 2009 © 2009 The Korean Physical Society.

Abstract
We have developed an embedded Data AcQuisition (DAQ) board which hasan Ethernet controller and a charge integrator. We could monitor thebeam profile outside the beam line by using this system with anEthernet connection. This embedded DAQ board consists of amicrocontroller a network controller, field programmable gate array(FPGA) and a currentstodigital converter with a wide dynamic range,a variable integration time and a 20-bit resolution. The board wastested with a proton beam by using the MC-50 cyclotron at the KoreaInstitute of Radiological and Medical Sciences. The board wasconnected to a homemade ion-chamber and it took the currents signalfrom the ion-chamber directly. The signals were integrated by usingthe charge integration function of the board. The data were recordedthrough the Ethernet connection by using a personal computer. Wemonitored the beam condition with different beam currents from 1 nAto 10 nA We could successfully measure the dose of the 45-MeV protonbeam with various beam currents by using this charge integrationembedded DAQ board.
Keywords: FPGA, Charge integrator, Ethernet, Ion chamber, DAQ, Embedded board


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