ISOLDE facility recommissioning HARWARE TESTS REXEBIS Commissioning of

ISOLDE facility recommissioning HARWARE TESTS: - REXEBIS: Commissioning of the new Electron Gun ongoing. The new gun was taken out last week after discharges occurred when applying bias voltage for the cathode. Investigations ongoing. Suspicion of issues with the Al 2 O 3 insulation tubes which will be cleaned, and air fired. NEG strips will be installed as well to improve vacuum and hopefully get rid of Ir and Ce contaminants from the cathode material. Aiming to restart the e-beam again from the new gun in September (F. Wenander, G. Khatri, M. Lozano) - HIE ISOLDE: RF Conditioning at warm for the HIE SRF cavities finished (D. Valuch, W. Venturini). Cooldown with cold He gas (40/45 K) ongoing (cavities at ~70 K now). Ready to continue the cooldown procedure with liquid He to the cavities by the end of this week to slowly bring down the cavities to 4. 5 K (T. Dupont, N. Guillotin) followed by RF conditioning at cold (D. Valuch). - REX RF: Recommissioning going according to plan. RF to the REX cavities. Acquisition applications ready for OP to use (C. Gagliardi, L. Timeo) - Vacuum: Final vacuum work planned for today on a few leaks in the machine (MSW, CAO, Tapestation). As well as next week to replace the GPS separator, GLM and GHM TP after which all hall related ISOLDE vacuum work will be finished (J. Ferreira Somoza, G. Merino Fernandez, A. Gutierrez) - Beam Instrumention: Lot of progress on numerous issues concerning BI controls have been solved (E. Bravin, S. Sadovich). Some remaining issues with the Si detectors acquisition. Tests to be carried out with the high level applications (E. Piselli) - Controls: Intermittent glitches in the control system observed only once last week (Thursday 11: 20). All controls freeze for around five seconds. (E. Piselli, BE-CO) INSTALLATION WORK: - Nano lab civil engineering work finished - FE#10 (GPS) installation work continuing according to plan (J. Vollaire, S. Marzari et all. ) 18/08/2020 Facilities Operations Meeting 2020 Erwin Siesling BE-OP-ISO