| Paper |
Title |
Other Keywords |
Page |
| PO16 |
MULTIPHYSICS AND PRESSURE CODE ANALYSIS FOR QUARTER WAVE β=0.085 AND HALF WAVE β=0.29 RESONATORS |
simulation, cavity, target, radio-frequency |
92 |
| |
- S.J. Miller, J. Binkowski, A. Facco, M.J. Johnson, Y. Xu
FRIB, East Lansing, Michigan, USA
|
|
| |
Funding: U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661
The driver linac design for the Facility for Rare Isotope Beams (FRIB) at Michigan State University (MSU) makes use of four optimized superconducting radio frequency (RF) resonators to accelerate exotic ions to 200 MeV/μ. The RF resonators were optimized using computer simulations for all expected physical encounters and corresponding electrical resonant frequency changes. Principal guidance from the ASME boiler and pressure vessel code (BPVC) were applied.
|
|
|
Poster PO16 [0.535 MB]
|
|
| |
| TUA01 |
Heavy Ion Accelerator Development at IUAC Delhi |
ion, heavy-ion, linac, ion-source |
105 |
| |
- D. Kanjilal
IUAC, New Delhi, India
|
|
| |
Inter University Accelerator Centre has been involved in the development of heavy ion accelerators, ion sources, beam lines and experimental facilities for providing various heavy ion beams in a wide energy range varying from a few tens of keV to hundreds of MeV for experiments by more than four hundred research groups from all over India and abroad. A large vertical Pelletron electrostatic tandem accelerator capable of achieving terminal voltage up to 16MV has been in operational for more than a couple of decades. Superconducting niobium linac booster accelerating modules having eight niobium quarter wave resonators each have been developed and used. A high temperature superconducting electron cyclotron resonance ion source (HTS-ECRIS) was designed, fabricated and installed. It is in regular operation for production of highly charged ion beams for alternate high current injector (HCI) system consisting of radio frequency quadrupole and drift tube Linacs. Details of developments of various heavy ion beam facilities and experimental systems at IUAC will be presented.
|
|
|
Slides TUA01 [5.689 MB]
|
|
| |
| WEC01 |
Production 72 MHz β=0.077 Superconducting Quarter-wave Cavities for ATLAS |
cavity, linac, heavy-ion, acceleration |
174 |
| |
- M.P. Kelly, Z.A. Conway, S.M. Gerbick, M. Kedzie, R.C. Murphy, B. Mustapha, P.N. Ostroumov, T. Reid
ANL, Argonne, USA
|
|
| |
A total of eight 72 MHz β=0.077 superconducting quarter-wave cavities have recently been completed at Argonne National Laboratory. Seven of these will installed into the ATLAS superconducting heavy-ion linac as part of a beam intensity upgrade, with one remaining for the purposes of continuing to push the performance limits in these structures. Cavities were fabricated using techniques adapted the worldwide effort push niobium cavities close to the material limits. Key developments include the use of electropolishing on the complete helium-jacketed cavity. Wire EDM has been used instead of traditional niobium machining in order to minimize performance limiting defects near the weld seams. Hydrogen degassing at 600C after electropolishing has also been performed. Initial test results show practical acceleration at 4 Kelvin with cavity voltages, Vacc>3 MV/cavity and at 2 Kelvin with Bpeak>120 mT and Vacc>5 MV/cavity.
|
|
|
|
Slides WEC01 [2.843 MB]
|
|
| |
| WEC04 |
Operation of Superconducting Linac and Commissioning of the Last Linac at IUAC Delhi |
linac, acceleration, damping, bunching |
185 |
| |
- S. Ghosh, R. Ahuja, J. Antony, S. Babu, J. Chacko, A. Choudhury, G.K. Chowdhury, T.S. Datta, R.N. Dutt, R. Joshi, D. Kanjilal, S. Kar, J. Karmakar, M. Kumar, R. Kumar, D.S. Mathuria, K.K. Mistri, A. Pandey, P. Patra, P.N. Prakash, A. Rai, A. Roy, J. Sacharias, B.K. Sahu, A. Sarkar, S.S. Sonti
IUAC, New Delhi, India
|
|
| |
The major part of the superconducting linac at IUAC has been operational for the past few years and the last accelerating module is in the final stage of completion. The full linac system consists of five cryostats, housing a total of twenty seven niobium quarter wave resonators. At present, the Superbuncher, the first two linac accelerating modules and the Rebuncher are operational and ion beams in the mass range 12C to 107Ag from Pelletron accelerator have been further accelerated and delivered to conduct experiments. A method of random phase focusing to select the accelerating phase of the resonators between 70° and 110° has been successfully tried to reduce the final time width of the beam bunch. Presently, to improve the accelerating fields of the linac resonators in phase locked condition, efforts are dedicated towards improvement of the cooling efficiency of the drive coupler, enhancement of the microphonics damping efficiency with mixtures of SS-balls and testing of an alternate tuning mechanism based by Piezo Crystal. The beam acceleration through the complete linac is to be performed by end of the summer of 2012.
|
|
|
|
Slides WEC04 [2.810 MB]
|
|
| |