Dresden 2014 – wissenschaftliches Programm
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BE: Beschleunigerphysik
BE 4: Diagnostics and Instrumentation II
BE 4.3: Vortrag
Dienstag, 1. April 2014, 10:15–10:30, ZEU 255
Beam Heat Load Measurements with COLDDIAG at the Diamond Light Source — •Robert Voutta1, Sara Casalbuoni1, Stefan Gerstl1, Andreas Wolfgang Grau1, David Saez de Jauregui1, Tomas Holubek1, Riccardo Bartolini2, Matthew Peter Cox2, Emily Carya Longhi2, Günther Rehm2, Jos Chris Schouten2, Richard Walker2, Mauro Migliorati3, and Bruno Spataro3 — 1Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany — 2Diamond Light Source, Oxfordshire, England — 3INFN/LNF, Frascati, Italy
Understanding the heat load from an electron beam to the cold beam tube (liner) is an open issue of great interest for the cryogenic layout of superconducting insertion devices. COLDDIAG, a cold vacuum chamber for diagnostics was designed and built especially for this purpose. The instrumentation comprises temperature sensors, pressure gauges, mass spectrometers as well as retarding field analyzers with which it is possible to measure the beam heat load, total pressure, and gas content as well as the flux of particles hitting the chamber walls. COLDDIAG was installed in November 2011 in the Diamond light source (DLS). Due to a mechanical failure at one thermal transition, it was removed after only one week of operation. A redesign of the faulty transition in COLDDIAG allowed reinstallation in August 2012. In this presentation, we report on the measurements and results obtained during the first months since reinstallation in the DLS.