Title :
Wire-scanner design for the SNS superconducting-RF linac
Author :
Hardekopf, R. ; Meyer, R., Sr. ; Plum, M. ; Power, J. ; Rose, C. ; Sattler, D. ; Shafer, R.
Author_Institution :
Los Alamos Nat. Lab., NM, USA
fDate :
6/23/1905 12:00:00 AM
Abstract :
The requirement for profile measurements in the SNS superconducting-RF (SRF) linac has presented diagnostic designers with unusual challenges. In addition to making accurate measurements of a high-brightness H- beam, the device must be compatible with 10-10 Torr vacuum requirements. Also, it cannot impact reliability of the nearby superconducting structures, either by failure modes, by introducing particulate matter, by vaporization, or by producing excessive radiation levels. We have designed a device to meet these stringent requirements by using a lever-action mechanism and a formed bellows that provide a clean interface and keep all moving joints outside the vacuum. Both tungsten and niobium wires are suitable, but thermal properties and charge collection are important issues that are considered. The prototype currently being fabricated will be used to verify vacuum and reliability performance
Keywords :
ion accelerators; linear accelerators; particle beam diagnostics; 0.0000000001 torr; H- beam; Nb; Nb wire; SNS superconducting RF linac; W; W wire; bellows; charge collection; lever-action; reliability; thermal properties; vacuum; wire-scanner; Apertures; Bellows; Laboratories; Lattices; Linear particle accelerator; Particle beams; Power measurement; Strontium; Superconducting devices; Superconducting filaments and wires;
Conference_Titel :
Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001
Print_ISBN :
0-7803-7191-7
DOI :
10.1109/PAC.2001.986664
