Commissioning of the MAX 700MHz test stand

Abstract

TUPP080International audienceThe MYRRHA project aims at the construction of anAccelerator Driven System demonstrator. The criticalitywill be sustained by an external spallation neutron fluxproduced thanks to a 600 MeV high intensity protonbeam. This beam will be delivered by a superconductinglinac which must fulfil very stringent reliabilityrequirements. Under the MAX (MYRRHA AcceleratoreXperiment) program, which aims at pursuing the R&Dactivities on the ADS-type accelerator, a 700 MHzCryomodule was developed. The main goal of this teststand is to dispose of a facility to carry out “real scale”reliability oriented studies on a RF Superconductingcavity of the high-energy linac section. This module holdsa 5-cell elliptical cavity equipped with its blade coldtuning system and its coaxial power coupler. Theexperimental work undertaken at IPN Orsay, has allowedto fully qualify the module in machine configuration(high RF power, at 2K), including assessment of thetuning system and measurement of microphonicsspectrums. During this study the dynamic behavior of thefast tuning system of the cavity was also measured. Wereview here the obtained results and lessons learnt byoperating this module