| Paper |
Title |
Page |
| MOP047 |
An RFQ-Decelerator for HITRAP
|
151 |
| |
- B. Hofmann, A. Schempp
IAP, Frankfurt-am-Main
- O. K. Kester
GSI, Darmstadt
|
|
| |
The HITRAP linac at GSI will decelerate ions from 5 MeV/u to 6 keV/u for experiments with the large GSI Penning trap. The ions are decelerated at first in the existing experimental storage ring (ESR) down to an energy of 5 MeV/u and will be injected into a new Decelerator-Linac consisting of a IH-structure, which decelerates down to 500keV/u, and a 4-Rod RFQ , decelerating to 5 keV/u. The properties of the RFQ decelerator and the status of the project will be discussed.
|
|
| MOP051 |
Development of an Intense Neutron Source FRANZ in Frankfurt
|
159 |
| |
- O. Meusel, L. P. Chau, I. Mueller, U. Ratzinger, A. Schempp, K. Volk, C. Zhang
IAP, Frankfurt-am-Main
- S. Minaev
ITEP, Moscow
|
|
| |
The Stern-Gerlach-Center recently founded at the University of Frankfurt gives the possibility for experiments in accelerator physic, astrophysic and material sience research. It is planned to develop an intense neutron generator within the next 4 years. The proton driver linac consists of a high voltage terminal already under construction to provide primary proton beam energies of max. 150 keV. A volume type ion source will deliver a DC beam current of 100-250 mA at a proton fraction of 90%. A low energy beam transport using two solenoids will inject the proton beam into an RFQ while a chopper at the entrance of the RFQ will create a pulse length of 50 ns and a repetition rate up to 250 kHz. A drift tube cavity for the variation of the beam energy in a range of 1.9 – 2.4 MeV will be installed downstream of the RFQ. Finally a bunch compressor of the Mobley type forms a proton pulse length of 1 ns at the Li target. The maximum energies of the neutrons being adjustable between 100 keV and 500 keV by the primary proton beam. The detailed concept of the high current injector, numerical simulation of beam transport and losses will be presented together with first experimental results.
|
|
| MOP052 |
First Performance Test of an Integrated RFQ-Drifttube-Combination
|
162 |
| |
- A. Bechtold, M. Otto, A. Schempp
IAP, Frankfurt-am-Main
|
|
| |
In the frame of a collaboration with the GSI in Darmstadt an RFQ-Drifttube-Combination for the Heidelberg cancer therapy center HICAT has been designed, built and successfully beam tested at the IAP Frankfurt. The integration and combination of both an RFQ and a rebunching drifttube unit inside a common cavity forming one single resonant RF-structure has been realized for the first time with this machine. The results of the beam measurements and questions about the beam dynamics simulations have been investigated in detail with the code RFQSIM.
|
|
| MOP061 |
The 70-MeV Proton Linac for the Facility for Antiproton and Ion Research FAIR
|
186 |
| |
- L. Groening, W. Barth, L. A. Dahl, W. Vinzenz, S. Yaramyshev
GSI, Darmstadt
- G. Clemente, U. Ratzinger, A. Schempp, R. Tiede
IAP, Frankfurt-am-Main
|
|
| |
A significant part of the experimental program at FAIR is dedicated to antiproton (pbar) physics requiring up to 7·1010 cooled pbars per hour. Taking into account the pbar production and cooling rate, this is equivalent to a primary proton beam of 2·1016 protons per hour to be provided by a 70 MeV proton linac preceding two synchrotrons. It has to deliver a pulsed proton beam of 70 mA of 36 μs duration at a repetition rate of 4 Hz. The normalized transverse emittances must not exceed 2.8 mm mrad and the total relative momentum spread must be less than 0.1%. The normal conducting DTL comprises 12 Crossed-bar H-cavities (CH) fed by six rf-power sources in total. The basic layout of the linac as well as the overall cost estimate has been completed including several reviews by external committees. A technical report has been completed in May 2006. This paper gives a general overview on the status of the project.
|
|
| MOP046 |
Commissioning of the 7-MeV/u, 217-MHz Injector Linac for the Heavy Ion Cancer Therapy Facility at the University Clinics in Heidelberg
|
148 |
| |
- B. Schlitt, R. Baer, W. Barth, T. G. Fleck, M. Hoerr, G. Hutter, C. M. Kleffner, M. T. Maier, A. Peters, M. Schwickert, K. Tinschert, W. Vinzenz, H. Vormann, D. Wilms
GSI, Darmstadt
- R. Cee, E. Feldmeier, B. Naas, S. Scheloske, J. Suhm, S. Vollmer, T. Winkelmann
HIT, Heidelberg
- G. Clemente, U. Ratzinger, A. Schempp
IAP, Frankfurt-am-Main
- S. Minaev
ITEP, Moscow
|
|
| |
A clinical synchrotron facility designed by GSI for cancer therapy using energetic proton and ion beams (C, He and O) is under construction at the university clinics in Heidelberg, Germany. In this contribution the current status of the injector linac is reported. The installation and commissioning of the linac is performed gradually in three steps for the ion sources and the LEBT, the 400 keV/u RFQ and the 7 MeV/u IH-type drift tube linac. Two powerful 14.5 GHz permanent magnet ECR ion sources from PANTECHNIK as well as the LEBT and the linac RF system have been installed in Heidelberg between November 2005 and March 2006. A test bench with versatile beam diagnostics elements has been designed and installed for the commissioning phase. In April 2006 the two ion sources produced the first ion beams on the site. Extensive RFQ tests using proton beams have been performed at test benches at the IAP and at GSI already during 2004-2006. The 1.4 MW 217 MHz amplifier for the IH tank has also been commissioned at a test setup at GSI in advance to the installation in Heidelberg. The RF tuning of the 20 MV IH-DTL cavity is performed by the IAP in close cooperation with GSI.
|
|
| MOP063 |
Deceleration of Highly Charged Ions for the HITRAP Project at GSI
|
189 |
| |
- O. K. Kester, W. Barth, L. A. Dahl, F. Herfurth, M. Kaiser, H. J. Kluge, C. Kozhuharov, W. Quint
GSI, Darmstadt
- B. Hofmann, U. Ratzinger, A. C. Sauer, A. Schempp
IAP, Frankfurt-am-Main
|
|
| |
The highly charged heavy ion trap (HITRAP) project at GSI is a funded mid term project and is planned to be operational end of 2007. Highly charged ions up to U92+ provided by the GSI accelerator facility will be decelerated from 4 MeV/u down to 6 keV/u and subsequently be injected into a large Penning trap for further deceleration and phase space cooling. The deceleration is done in a combination of the GSI experimental storage ring (ESR) and a linac based on an IH-structure and a RFQ. In front of the decelerator linac a double drift-buncher-system provides for phase focusing and a final de-buncher integrated in the RFQ-tank reduces the energy spread in order to improve the efficiency for beam capture in the cooler trap. The paper reports the beam dynamics design along the entire decelerator down to the trap injection point, as well as and the status of the cavities. Finally the time schedule and ESR and linac commissioning are discussed.
|
|
| THP064 |
Tuning a CW 4-Rod RFQ
|
728 |
| |
- P. Fischer, A. Schempp
IAP, Frankfurt-am-Main
|
|
| |
A 4-Rod RFQ has been built, which operates cw and will accelerate 5mA D beams up to 3 MeV. The length of the structure is 3.8 m, the power consumption as high as 250 kW. The tuning of a 4-Rod RFQ with 30 rf-cells at the frequency of 175 MHz is difficult, so procedures have been developed, to facilitate this work. The properties of the RFQ accelerator, the tuning procedure and the status of the project will be discussed.
|
|
| THP089 |
Testbench of the HICAT RFQ at GSI
|
791 |
| |
- C. M. Kleffner, R. Baer, W. Barth, M. Galonska, F. Heymach, R. Hollinger, G. Hutter, W. Kaufmann, M. T. Maier, A. Reiter, B. Schlitt, M. Schwickert, P. S. Spaedtke, W. Vinzenz
GSI, Darmstadt
- A. Bechtold, A. Schempp
IAP, Frankfurt-am-Main
- R. Cee, E. Feldmeier, S. Vollmer
HIT, Heidelberg
|
|
| |
In April 2006 the commissioning of the ion linac for the HICAT therapy facility in Heidelberg, Germany was started. In preparation of this commissioning process beam tests of the RFQ cavity with protons were carried out at GSI. The RFQ cavity for the HICAT facility was delivered to GSI in March 2005. The operation with an rf power up to 200 kW and a pulse width of 500 μsec could be accomplished successfully after a short time of rf-conditioning to assure the operation mode with carbon ions. A testbench for the RFQ cavity was constructed at GSI to allow for exact measurements of the output energy with the time of flight (ToF) method in addition to the beam tests at IAP Frankfurt. Due to the fact that the rebuncher is fully integrated into the RFQ rf-structure beam studies with different mechanical settings of the rebuncher had to be conducted. For each setting the effective voltage of the rebuncher could be estimated. The final mechanical setting was chosen with respect to required longitudinal matching to the IH structure behind of the RFQ.
|
|