Cyclotrons2016 - List of Keywords (cathode)

Paper	Title	Other Keywords	Page
MOP05	An Air Ionization Chamber Simulation using Monte Carlo Method	simulation, detector, radiation, photon	57
	S.G. Hou, Shizhong. An, Z.W. Liu, G.F. Song, F. Wang, L.P. Wen, T.J. Zhang CIAE, Beijing, People's Republic of China
	The CYCIAE-100 cyclotron has been built at CIAE, designed to achieve 200 μA protons at 100 MeV and deliver them to several experimental targets. To achieve this goal and protect the machine from excessive radiation activation, an uncontrolled loss criteria of 1uA has been specified. Previous calculation for radiation shielding showed that high neutron and gamma were produced under this condition. To measure the high energy gamma ray(about 2 MeV ) at machine running and void damage by the prompt radiation, an air ionization chamber was designed to fulfill this goal. A Geant4 program was developed to simulate the energy response of detectors, the EM filed data was also taken into consideration in the programl. The simulation results indicate that the energy response linearity satisfies the requirement of the project specification.
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TUP02	Cold Cathode Ion Source for IBA CYCLONE®230	ion, power-supply, ion-source, cyclotron	164
	P. Cailliau, J.C. Amelia, J. Brison, E. Forton IBA, Louvain-la-Neuve, Belgium M. Conjat, J. Mandrillon, P. Mandrillon AIMA, Nice, France
	At IBA, we use a P.I.G. floating cathode ion source for injection in the CYCLONE®230 cyclotron. The purpose of the project is to investigate how the pre-sent ion source could be replaced by a P.I.G. cold cathodes one with a longer lifetime. Experiments de-scribed in this article were done on a dedicated test setup to benchmark the different modes. A new chimney design has been developed to test cold cath-ode mode in CYCLONE®230 without any other me-chanical modifications.
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WEB02	Hybrid Configuration, Solid State-Tube, Revamps an Obsolete Tube Amplifier for the INFB K-800 Superconducting Cyclotron	cyclotron, operation, impedance, network	263
	A.C. Caruso, F. Caruso, A. Longhitano, A. Spartà INFN/LNS, Catania, Italy G. Primadei CERN, Geneva, Switzerland J. Sura Warsaw University, Warsaw, Poland
	An insertion of a solid state amplifier is substituting the obsolete first stage of a full tube RF power amplifier. The amplifier is based on two tube stages. The first, equipped by a tetrode, the RS1054, was being manufactured by Thales until a couple of years ago. Some spare parts have been ordered but not enough to guarantee smooth cyclotron operation for the next few years. It was necessary to come up with a new solution. We were basically at a crossroad: replace the first stage with another tube still in production or change the technology from tube to solid state. A study, from market research to the technology point of view was carried out and the final decision was to use a solid state stage as an innovative solution for this kind of power vs frequency range of operation. The prototype of this hybrid amplifier has been in operation with our cyclotron since January 2015. The details of these decisions, the description of the modified amplifier (solid state – tube) and the successful results of this hybrid configuration will be shown in this presentation.
	Slides WEB02 [3.178 MB]
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THP06	Recent Ion Source Developments for VARIAN's ProBeam® Cyclotron	ion, ion-source, cyclotron, operation	316
	S. Busold, H. Röcken VMS-PT, Troisdorf, Germany A.S. Partowidjojo, J.M. Schippers PSI, Villigen PSI, Switzerland
	The cold cathode Penning ionization gauge (PIG) type proton source of the VARIANÂ’s ProBeam® 250 MeV superconducting isochronous cyclotron suffers from the usual cathode/chimney erosion during operation. Furthermore, a relatively high hydrogen gas flow is needed to generate a proton beam in the μA range, which induces conditions for RF operation below optimum. In the quest to increase cathode/chimney life time and thereby directly extend service intervals, thus reducing the total cost of ownership, several experimental investigations have been performed at a dedicated test bench at PSI, Switzerland, including material studies, a detailed operation analysis and switching to a hot cathode design.
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Paper

Title

Other Keywords

Page

MOP05

An Air Ionization Chamber Simulation using Monte Carlo Method

simulation, detector, radiation, photon

57

S.G. Hou, Shizhong. An, Z.W. Liu, G.F. Song, F. Wang, L.P. Wen, T.J. Zhang
CIAE, Beijing, People's Republic of China

The CYCIAE-100 cyclotron has been built at CIAE, designed to achieve 200 μA protons at 100 MeV and deliver them to several experimental targets. To achieve this goal and protect the machine from excessive radiation activation, an uncontrolled loss criteria of 1uA has been specified. Previous calculation for radiation shielding showed that high neutron and gamma were produced under this condition. To measure the high energy gamma ray(about 2 MeV ) at machine running and void damage by the prompt radiation, an air ionization chamber was designed to fulfill this goal. A Geant4 program was developed to simulate the energy response of detectors, the EM filed data was also taken into consideration in the programl. The simulation results indicate that the energy response linearity satisfies the requirement of the project specification.

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reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUP02

Cold Cathode Ion Source for IBA CYCLONE®230

ion, power-supply, ion-source, cyclotron

164

P. Cailliau, J.C. Amelia, J. Brison, E. Forton
IBA, Louvain-la-Neuve, Belgium
M. Conjat, J. Mandrillon, P. Mandrillon
AIMA, Nice, France

At IBA, we use a P.I.G. floating cathode ion source for injection in the CYCLONE®230 cyclotron. The purpose of the project is to investigate how the pre-sent ion source could be replaced by a P.I.G. cold cathodes one with a longer lifetime. Experiments de-scribed in this article were done on a dedicated test setup to benchmark the different modes. A new chimney design has been developed to test cold cath-ode mode in CYCLONE®230 without any other me-chanical modifications.

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WEB02

Hybrid Configuration, Solid State-Tube, Revamps an Obsolete Tube Amplifier for the INFB K-800 Superconducting Cyclotron

cyclotron, operation, impedance, network

263

A.C. Caruso, F. Caruso, A. Longhitano, A. Spartà
INFN/LNS, Catania, Italy
G. Primadei
CERN, Geneva, Switzerland
J. Sura
Warsaw University, Warsaw, Poland

An insertion of a solid state amplifier is substituting the obsolete first stage of a full tube RF power amplifier. The amplifier is based on two tube stages. The first, equipped by a tetrode, the RS1054, was being manufactured by Thales until a couple of years ago. Some spare parts have been ordered but not enough to guarantee smooth cyclotron operation for the next few years. It was necessary to come up with a new solution. We were basically at a crossroad: replace the first stage with another tube still in production or change the technology from tube to solid state. A study, from market research to the technology point of view was carried out and the final decision was to use a solid state stage as an innovative solution for this kind of power vs frequency range of operation. The prototype of this hybrid amplifier has been in operation with our cyclotron since January 2015. The details of these decisions, the description of the modified amplifier (solid state – tube) and the successful results of this hybrid configuration will be shown in this presentation.

Slides WEB02 [3.178 MB]

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reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THP06

Recent Ion Source Developments for VARIAN's ProBeam® Cyclotron

ion, ion-source, cyclotron, operation

316

S. Busold, H. Röcken
VMS-PT, Troisdorf, Germany
A.S. Partowidjojo, J.M. Schippers
PSI, Villigen PSI, Switzerland

The cold cathode Penning ionization gauge (PIG) type proton source of the VARIANÂ’s ProBeam® 250 MeV superconducting isochronous cyclotron suffers from the usual cathode/chimney erosion during operation. Furthermore, a relatively high hydrogen gas flow is needed to generate a proton beam in the μA range, which induces conditions for RF operation below optimum. In the quest to increase cathode/chimney life time and thereby directly extend service intervals, thus reducing the total cost of ownership, several experimental investigations have been performed at a dedicated test bench at PSI, Switzerland, including material studies, a detailed operation analysis and switching to a hot cathode design.

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