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Kang, B.-K.

Paper Title Page
TUPCH070 Development of Beam Profile Monitor for Cyclotron 1169
 
  • K.-H. Park, S.-M. Hong, Y.G. Jung, D.E. Kim, H.-G. Lee, W.W. Lee
    PAL, Pohang, Kyungbuk
  • D.H. An, J.-S. Chai, Y.S. Kim
    KIRAMS, Seoul
  • B.-K. Kang
    POSTECH, Pohang, Kyungbuk
 
  A beam profile monitor was designed and fabricated to measure the beam shape of the cyclotron MC50 beam line at KIRAMS. The sensor module was made of 13 tungsten wires and they were assembled into an array type. The sensor wires whose diameter is 1 mm were placed in parallel with the incident beam, while they were placed in the perpendicular direction to the incident beam in the conventional method. Thus this monitor has a linear actuator to scan whole beam profile, which moves the sensor module from the dormant to measurement position or vice versa. The current output of each sensor was amplified using a trans-resistance amplifier which can measure input current in the range of 1 pA. The amplifier had a resolution of ~ 20 fA, the temperature drift of ~0.5 pA/°C, and the signal-to-noise ratio greater than 80 dB. Various test results of the amplifier and sensor module assembly are given in this paper. The measured current profiles of cyclotron beam line at KIRAMS are also given.