Commissioning of the MAX 700MHz test stand
Résumé
The MYRRHA project aims at the construction of an
Accelerator Driven System demonstrator. The criticality
will be sustained by an external spallation neutron flux
produced thanks to a 600 MeV high intensity proton
beam. This beam will be delivered by a superconducting
linac which must fulfil very stringent reliability
requirements. Under the MAX (MYRRHA Accelerator
eXperiment) program, which aims at pursuing the R&D
activities on the ADS-type accelerator, a 700 MHz
Cryomodule was developed. The main goal of this test
stand is to dispose of a facility to carry out “real scale”
reliability oriented studies on a RF Superconducting
cavity of the high-energy linac section. This module holds
a 5-cell elliptical cavity equipped with its blade cold
tuning system and its coaxial power coupler. The
experimental work undertaken at IPN Orsay, has allowed
to fully qualify the module in machine configuration
(high RF power, at 2K), including assessment of the
tuning system and measurement of microphonics
spectrums. During this study the dynamic behavior of the
fast tuning system of the cavity was also measured. We
review here the obtained results and lessons learnt by
operating this module.