| Paper | Title | Page |
|---|---|---|
TUPP074 |
Study on Fabrication of Superconducting RF 9-cell Cavity for ILC at KEK. | |
|
||
| We had constructed the Cavity Fabrication Facility (CFF) for the fabrication of superconducting RF cavity at KEK from 2009 to 2011. In the facility, we installed a deep-drawing machine, a half-cup trimming machine, an electron-beam welding machine, and a chemical etching room in one place. We started the study on the fabrication of 9-cell cavity for International Linear Collier (ILC) from 2009 using this facility. The study is focusing on the cost reduction with keeping high performance of cavity, and the goal is the establishment of mass-production procedure for ILC. We finished the fabrication of two 9-cell cavities by using tools, machines, and equipment of this facility. This article reports the current status of the studies on fabrication of cavity, including the results of vertical tests for the 9-cell cavities which were fabricated in this facillity. | ||
| TUPP075 | The First Beam Recirculation and Beam Tuning in the Compact ERL at KEK | 599 |
| TUPOL01 | use link to see paper's listing under its alternate paper code | |
|
||
|
Superconducting(SC)-linac-based light sources, which can produce ultra-brilliant photon beams in CW operation, are attracting worldwide attention. In KEK, we have been conducting R&D efforts towards the energy-recovery-linac(ERL)-based light source* since 2006. To demonstrate the key technologies for the ERL, we constructed the Compact ERL (cERL)** from 2009 to 2013. In the cERL, high-brightness CW electron beams are produced using a 500-kV photocathode DC gun. The beams are accelerated using SC cavities, transported through a recirculation loop, decelerated in the SC cavities, and dumped. In the February of 2014, we succeeded in accelerating and recirculating the CW beams of 4.5 micro-amperes in the cERL; the beams were successfully transported from the gun to the beam dump under energy recovery operation in the main linac. Then, precise tuning of beam optics and diagnostics of beam properties are under way. We report our experience on the beam commissioning, as well as the results of initial measurements of beam properties.
* N. Nakamura, IPAC2012, TUXB02. ** S. Sakanaka et al., IPAC2013, WEPWA015. |
||
| THPP100 | Result of MHI 2-Cell Seamless Dumb-Bell Cavity Vertical Test | 1087 |
|
||
| MHI have supplied several 9-cell cavities for STF (R&D of ILC project at KEK) and have been considering production method for stable quality and cost reduction, seamless dumb-bell cavity was one of them. We had fabricated a 2 cell seamless dumb-bell cavity for cost reduction and measured RF performance in collaboration with JLab, KEK and MHI. Surface treatment recipe for ILC was applied for MHI 2-cell cavity and vertical test was performed at JLab. The cavity reached Eacc=32.4MV/m after BCP and EP. Details of the result are reported. | ||