I.E. Campisi,
S. Assadi,
F. Casagrande,
M. Champion,
P. Chu,
S. Cousineau,
M. Crofford,
C. Deibele,
J.D. Galambos,
P. Gurd, [......],
D. Jeon,
Y.W. Kang,
K. Kasemir,
Z. Kursun,
H. Ma, M. Piller,
D. Stout,
W. Strong,
A. Vassioutchenko,
Y. Zhang
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ABSTRACT: The Spallation Neutron Source being built at Oak Ridge National Laboratory employs eighty one 805 MHz superconducting cavities operated at 2.1 K to accelerate the H-beam from 187 MeV to about 1 GeV. The superconducting cavities and cryomodules with two different values of beta (. 61 and .81) have been designed and constructed at Jefferson Lab for operation at 2.1 K with unloaded Q’s in excess of 5×10<sup>9</sup>. To gain experience in testing cryomodules in the SNS tunnel before the final commissioning of the 2.1 K Central Helium Liquefier, integration tests are being conducted on the cryomodules at 4.2 K. This is the first time that a superconducting cavity system specifically designed for 2.1 K operation has been extensively tested at 4.2 K without superfluid helium.
Particle Accelerator Conference, 2005. PAC 2005. Proceedings of the; 06/2005
