High voltage conditioning of the electrostatic deflector of MARA
Partanen, J., Johansen, U., Sarén, J., Tuunanen, J., & Uusitalo, J. (2016). High voltage conditioning of the electrostatic deflector of MARA. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 376, 353-356. doi:10.1016/j.nimb.2015.11.025
Published inNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
© 2015 Elsevier B.V. This is a preprint version of an article whose final and definitive form has been published by Elsevier.
MARA is a new recoil mass separator in the Accelerator Laboratory of University of Jyväskylä (JYFL-ACCLAB) with a mass resolving power of 250 and an ion-optical configuration of QQQDEDM. In this paper the construction, control and conditioning of its electrostatic deflector are described. The deflector was designed for voltages up to 500 kV accross the gap, corresponding to a 3.6 MV/m field, to accomodate fusion reactions with inverse kinematics. Titanium electrodes with a beam dump opening in the anode are used. The conditioning procedure, which has been used repeatedly to take the deflector to 450 kV, is described, along with the safety systems and precautions that are in place.