• Inglese, Vitaliano
• Gutierrez, Abel
• Michel, Eric
• Kersevan, Roberto
• Bregliozzi, Giuseppe
• Rio, Benoit
• Pezzetti, Marco
• Costa Pinto, Pedro
• Jenninger, Berthold
• Chiggiato, Paolo
• Baglin, Vincent
• Salemme, Roberto
• Sapountzis, Antonios
• Gomes, Paulo
• Brodzinski, Krzysztof
• Bellorini, François

Abstract

COLDEX (Cold bore Experiment), installed in the Super Proton Synchrotron (SPS) at CERN, is a test vacuum sector used in 2001-2004 to validate the Large Hadron Collider (LHC) cryogenic vacuum system with LHC type proton beams. Its cryostat houses a 2.2 m long copper perforated beam screen surrounded by a stainless steel cold bore, both individually temperature controlled down to 5 and 3 K, respectively. In the framework of the development for the High Luminosity upgrade of the LHC (HL-LHC), COLDEX has been re-commissioned in 2014. The objective of this re-commissioning is the validation of the performance of amorphous carbon coatings at cryogenic temperature with LHC type beams. The existing COLDEX beam screen has been dismounted and carbon coated, while a complete overhaul of the vacuum, cryogenic and control systems has been carried out. This contribution describes the phases of re-commissioning and reviews the current experimental set-up. An overview of the possible measurements with COLDEX, in view of its HL-LHC experimental program, is also presented. Proceedings of the 6th Int. Particle Accelerator Conf., IPAC2015, Richmond, VA, USA

Topics

• impedance spectroscopy
• amorphous
• Carbon
• stainless steel
• phase
• experiment
• copper