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

Volume

2

fYear

2001

fDate

6/23/1905 12:00:00 AM

Firstpage

1312

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001

Print_ISBN

0-7803-7191-7

Type

conf

DOI

10.1109/PAC.2001.986664

Filename

986664