MOFAB1
KPH, Mainz, Germany
HIM, Mainz, Germany
The Mainz Energy-Recovering Superconducting Accelerator (MESA) is currently under construction at Johannes Gutenberg-University Mainz. It is a mulit-turn ERL for particle and nuclear physics experiments. As the centerpiece for acceleration a turn-key solution was chosen. Two modified ELBE/Rossendorf-type cryomodules will accelerate the electrons up to 25 MeV per turn. The modules will be operated in cw at an accelerating gradient of 12.5 MV/m. The modifications comprise of an integration of a piezo tuner system and a better thermal connection of the HOM antennas for allowing high beam current in cw operation. Site acceptance tests of both modules have been carried out at the Helmholtz Institute Mainz (HIM) and by now the first cryomodule was successfully operated at design gradient and could be accepted. This talk will cover the experiences with a turn-key solution made by industry and will show the results of the site acceptance tests.
KPH, Mainz, Germany
HIM, Mainz, Germany
IKP, Mainz, Germany
At Helmholtz Institute Mainz a cryomodule test bunker has been set up for testing dressed modules at 2 K. In a first measurement campaign the high power rf tests of two 1.3 GHz cryomodules for the future MESA accelerator have been performed. We will report on the performance of the test setup, the present and upcom-ing cryogenic installations at the Institute for Nuclear Physics at Mainz, and in particular on the Helium re-frigeration and transport system comprising of a 220 m transport line for liquified gases.