JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
@inproceedings{barkley:napac2022-moye4,
author = {W.C. Barkley and D.A. Bingham and M.J. Borden and J.A. Burkhart and D.J. Evans and J.T.M. Lyles and J.P. Montross and J.F. O’Hara and B.J. Roller and M. Sanchez Barrueta},
% author = {W.C. Barkley and D.A. Bingham and M.J. Borden and J.A. Burkhart and D.J. Evans and J.T.M. Lyles and others},
% author = {W.C. Barkley and others},
title = {{Diagnoses and Repair of a Crack in the Drift Tube LINAC Accelerating Structure at LANSCE}},
& booktitle = {Proc. NAPAC'22},
booktitle = {Proc. 5th Int. Particle Accel. Conf. (NAPAC'22)},
pages = {19--21},
eid = {MOYE4},
language = {english},
keywords = {vacuum, experiment, detector, linac, drift-tube-linac},
venue = {Albuquerque, NM, USA},
series = {International Particle Accelerator Conference},
number = {5},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {10},
year = {2022},
issn = {2673-7000},
isbn = {978-3-95450-232-5},
doi = {10.18429/JACoW-NAPAC2022-MOYE4},
url = {https://jacow.org/napac2022/papers/moye4.pdf},
abstract = {{Many were perplexed at the inability of Module 3 at LANSCE to operate at peak power and duty factor while running production beam. During the 2018 production run, the DTL began to intermittently break down, leading to a series of root cause investigations. These analyses included eliminating the usual suspects: vacuum leak, debris in tank, driveline window, power coupler, etc. The throttling back of repetition rate from 120 to 60 Hz allowed continued production with a diminished beam, one that reduced neutron flux to three experimental areas. During the annual shutdown in 2019, a more thorough investigation involving the use of x-ray detection, high-resolution cameras and IR detection through site glass windows was performed. After a tenacious search, a 30 cm long crack was discovered in a weld at one of the ion pump port grates. Inaccessibility for welding from the outside and in a confined space, non-intrusive repairs were tried first but were unsuccessful. Ultimately, an expert welder entered the tank to weld the crack under unfamiliar welding conditions. This paper describes the diagnoses, non-intrusive solutions and ultimate repair of the crack in the accelerating structure.}},
}