Cyclotrons2013 - List of Keywords (high-voltage)

Paper	Title	Other Keywords	Page
MOPPT002	Status of the HZB Cyclotron	proton, cyclotron, ion, neutron	31
	A. Denker, J. Bundesmann, T. Damerow, T. Fanselow, W. Hahn, G. Heidenreich, D. Hildebrand, U. Hiller, U. Muller, C. Rethfeldt, J.R. Röhrich HZB, Berlin, Germany D. Cordini, J. Heufelder, R. Stark, A. Weber Charite, Berlin, Germany
	For 15 years, eye tumours are treated in collaboration with the Charité - Universitätsmedizin Berlin. In 2012 we celebrated the 2000th patient. Our cyclotron is again served by 2 different injectors: a 6 MV Van-de-Graaff and a 2 MV tandetron. The tandetron was optimized especially for the requirements of therapy. Its advantages are easier handling, lower service requirements and a shorter injection beam line. Development of the source resulted in safe operation of more than 600 h and extremely stable beam current. The tandetron is in operation for therapy since 2011. The Van-de-Graaff was considered to be a temporary backup. New requests for beams with a very specific time structure occurred, which can be provided only with the Van-de-Graaff-cyclotron beam line. Pulse structures of high variability; from single pulses of 1 ns at a max. repetition rate of 75 kHz to pulse packets with a length up to 100 μs were tested. The latter was used for the production of pulsed neutron radiation for comprehensive testing of dosimeters. Although major breakdowns have a huge impact on the up-time due to the small number of beam time hours, breakdowns over the past years amounted to less than 5%.

TUPPT010	Variants of Grounding and Shielding in a Beam Diagnostics Measurement of Low Signal Currents	coupling, diagnostics, shielding, impedance	174
	R. Dölling PSI, Villigen PSI, Switzerland
	The performance of several variants of grounding and shielding of long measurements cables for small currents against ground potential differences has been estimated analytically.

TUPSH012	The Development of High Stability Magnet Power Supply	controls, power-supply, EPICS, feedback	245
	K.-H. Park, H.S. Han, Y.-G. Jung, D.E. Kim, S.-C. Kim, H.-G. Lee, H.S. Suh PAL, Pohang, Kyungbuk, Republic of Korea J.-S. Chai, Y.S. Lee SKKU, Suwon, Republic of Korea
	This paper presents the magnet power supply (MPS) for the beam correction magnet. The required current to energize the magnet was ±20 A. The MPS has been implemented using the digital signal processing technology and shows the high stability and other good responses. The stability of the MPS was about ~10 ppm in short and long term, respectively. Various experimental results such as stability, bandwidth and simulation are given in this paper

Paper

Title

Other Keywords

Page

MOPPT002

Status of the HZB Cyclotron

proton, cyclotron, ion, neutron

31

A. Denker, J. Bundesmann, T. Damerow, T. Fanselow, W. Hahn, G. Heidenreich, D. Hildebrand, U. Hiller, U. Muller, C. Rethfeldt, J.R. Röhrich
HZB, Berlin, Germany
D. Cordini, J. Heufelder, R. Stark, A. Weber
Charite, Berlin, Germany

For 15 years, eye tumours are treated in collaboration with the Charité - Universitätsmedizin Berlin. In 2012 we celebrated the 2000th patient. Our cyclotron is again served by 2 different injectors: a 6 MV Van-de-Graaff and a 2 MV tandetron. The tandetron was optimized especially for the requirements of therapy. Its advantages are easier handling, lower service requirements and a shorter injection beam line. Development of the source resulted in safe operation of more than 600 h and extremely stable beam current. The tandetron is in operation for therapy since 2011. The Van-de-Graaff was considered to be a temporary backup. New requests for beams with a very specific time structure occurred, which can be provided only with the Van-de-Graaff-cyclotron beam line. Pulse structures of high variability; from single pulses of 1 ns at a max. repetition rate of 75 kHz to pulse packets with a length up to 100 μs were tested. The latter was used for the production of pulsed neutron radiation for comprehensive testing of dosimeters. Although major breakdowns have a huge impact on the up-time due to the small number of beam time hours, breakdowns over the past years amounted to less than 5%.

TUPPT010

Variants of Grounding and Shielding in a Beam Diagnostics Measurement of Low Signal Currents

coupling, diagnostics, shielding, impedance

174

R. Dölling
PSI, Villigen PSI, Switzerland

The performance of several variants of grounding and shielding of long measurements cables for small currents against ground potential differences has been estimated analytically.

TUPSH012

The Development of High Stability Magnet Power Supply

controls, power-supply, EPICS, feedback

245

K.-H. Park, H.S. Han, Y.-G. Jung, D.E. Kim, S.-C. Kim, H.-G. Lee, H.S. Suh
PAL, Pohang, Kyungbuk, Republic of Korea
J.-S. Chai, Y.S. Lee
SKKU, Suwon, Republic of Korea

This paper presents the magnet power supply (MPS) for the beam correction magnet. The required current to energize the magnet was ±20 A. The MPS has been implemented using the digital signal processing technology and shows the high stability and other good responses. The stability of the MPS was about ~10 ppm in short and long term, respectively. Various experimental results such as stability, bandwidth and simulation are given in this paper