| Paper | Title | Page |
|---|
| WEP20 | 325 MHz power couplers of spokes cavities for modular, multiple power levels | 489 |
| | - Q. S. Shu, J. Susta, G. F. Chen, I. Phipps, F. H. Lu
AMAC Inc - T. Khabiboulline, N. Solyak
Fermilab
| |
| | In order to increase the protons energy up to 8 GeV
in a driver Linac, the particles must be accelerated
through various stages and three different power levels
(25kW, 100kW and 210kW) are required for the 325
MHz Fermilab Proton Driver couplers. The problem
identified by the project is that no High RF power coupler
for these cavities has ever been designed and produced
using US industrial capabilities. AMAC proposed a novel
resolution by development of innovative modular,
multiple power levels, 325 MHz spoke cavities power
couplers, which to meet three type cavities with one
coupler design. The simulation and concept design are
presented. The results of HFSS, MAFIA, ANSYS, and
Multipacting are also discussed. | |
| WEP36 | High current, large aperture, low HOM, single crystal Nb 2.85GHz superconducting cavity | 558 |
| | - Q. S. Shu, J. Susta, F. H. Lu, I. Phipps, J. L. Shi
AMAC Inc - R. P. Redwine, F. H. Wang, D. Wang
MIT
| |
| | There is an increasing demand for High beam Current,
high Radio-Frequency (RF) power S-band cavities in
existing and new accelerator projects, such as for a study
of future electron-ion collider (eRHIC) and a very
brilliant, broadband, teraherz coherent synchrotron
radiation source (CRS). To achieve this goal, the RF
cavities must be upgraded to a gap voltage of 1.5 MV in a
limited space available in the machine with a high
gradient superconducting cavity. At the present time
there are no cavities and accessories designed to support
the high beam currents of up to 10-100 mA and at the
same time provide a high gap voltage at such a high Sband
frequency. AMAC proposed a High Current, Large
Aperture, Low HOM, Single Crystal Nb 2.85GHz
Superconducting Cavity with high RF Power Coupler and
HOM absorber device. | |
| WEP37 | Nondistructive testing instrument of dished Nb sheets for SRF cavities based on squid technology | 562 |
| | - Q. S. Shu, J. Susta, G. F. Cheng, I. Phipps
AMAC Inc - R. Selim, J. Mast
Christopher Newport University - P. Kneisel, G. Myneni
JLab - I. Ben-Zvi
Brookhaven National Lab
| |
| | The performance of superconducting RF cavities used in
accelerators can be enhanced by detecting micro particles
and inclusions which are the most serious source of
performance degradation. These defects prevent the
cavities from reaching the highest possible accelerating
fields. We have developed a SQUID scanning system
based on eddy current technique that allows the scanning
of curved Nb samples. This SQUID scanning system
successfully located Tantalum defects about 100 um
diameter in a flat Nb sample and was able to also locate
the defects in a cylindrical surface sample. Most
importantly, however, the system successfully located the
defects on the backside of the flat sample and curved
sample, both 3-mm thick. This system can be used for the
inspection and detection of such defects during SRF
cavity manufacturing. | |