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Commissioning New CERN Accelerators : Linac 4 & PS Booster 2020 Re-commissioning October 03, 2018 Abdelouahid AKROH BEams Department (BE) - OPerations Group (OP) PS Booster section(PSB ) On behalf of Re-commissioning coordinators team OUTLINE I. LHC injectors complex III. Re-commissioning IV. Long Shutdown 2 works in the Booster V. 2020 machines preparation: Linac4/Booster VI. Summary Abdelouahid AKROH / BE-OP-PSB II. Long-term Schedule 2 OUTLINE I. LHC injectors complex III. Re-commissioning IV. Long Shutdown 2 works in the Booster V. 2020 machines preparation: Linac4/Booster VI. Summary Abdelouahid AKROH / BE-OP-PSB II. Long-term Schedule

3 Booster Determines beam intensity, Hor./Ver. parameters (1.4GeV/2GeV) PS Gives longitudinal structure (26GeV) SPS Final acceleration for LHC injection (450GeV) CCC - Cern Control Centre (cf. R.Giachinos talk) Main topic of this talk LEIR Ions provider for LHC Ion physics run (72 MeV) Abdelouahid AKROH / BE-OP-PSB LINAC 2 LINAC 4 Proton H- source and first stage of acceleration (50MeV/160MeV)

4 OUTLINE I. LHC injectors complex III. Re-commissioning IV. Long Shutdown 2 works in the Booster V. 2020 machines preparation: Linac4/Booster VI. Summary Abdelouahid AKROH / BE-OP-PSB II. Long-term Schedule 5 In order to increase the LHC performances, in the framework of LIU (LHC Injector Upgrade): Injectors have to be adapted, After technical stops and shutdowns, recommissioning of the machines is needed. Abdelouahid AKROH / BE-OP-PSB Were here 6 OUTLINE I. LHC injectors complex III. Re-commissioning IV. Long Shutdown 2 works in the Booster V. 2020 machines preparation: Linac4/Booster VI. Summary

Abdelouahid AKROH / BE-OP-PSB II. Long-term Schedule 7 New approach Since 2016 the operation group is responsible of re-commissioning. Each accelerator has one (or two) re-commissioning coordinator(s), members of the Operation group: Abdel Fabrice Akroh Chapuis BOOSTER WAO12 SLAC WAO16 SSRF WAO14 DESY Marc Delrieux Oliver Hans James Ridewood

PS ARW13 Australian Synchrotron Stephane Cettour -Cave SPS Domenic Nicosia LEIR Re-commissioning team for the LHC protons/ions injectors Mandate of re-commissioning coordinators: Prepare the machine for an efficient re-start from shutdown to beam operation 1. Participate in shutdown coordination meeting (with facility coordinator) in order to organize the recommissioning activities and create a planning. 2. Participate actively in the hardware re-commissioning. 3. Organize and participate in the dry runs. Abdelouahid AKROH / BE-OP-PSB WAO18 BNL 8 Developed by the COntrol Group in collaboration with OPeration Planning tool

NEW:Basic Online Accelerator Schedule Management (ASM), generic for all schedules. OLD: and laborious Microsoft Excel planning 08:30 10:30 HW TEST Tue TE-MSC: SPECIAL PERMIT ACCESS HV test) TE-MSC: Audio-visual inspection TE-MSC: High voltage tests - No co-activity W50 EYETS 2016-17 Wed Thur Technical stop beginning EN-ACE coordiantion

13:30 15:30 Fri Sat W13 HARDWARE COMMISSIONING Tue Wed Thur BE-RF: Maintenance of C02/C04/C16 and Finemet (in parallel) 27-Mar Mon Sun 08:30 10:30 TE-EPC: Test MPS IMPACTs suspendu Arnaud Bessonnat 13:30 TE-MSC: High voltage

tests - No co-activity TE-MSC: High voltage tests - No co-activity EN-ACE coordiantion 15:30 SU + BE-OP: PSB DSO tests HW Permit HSE-RP: Dry Run TE-MSC CROME002 + BE-OP: Installation B-Train tests BE-BI + BE- H. Boukabache M. Buzio OP: BE-BI + BE-OP: BE-BI + BE-OP: BE-BI + BE-OP: BPMPSB BPMPSB (TMS) BPMPSB (TMS) BPMPSB (TMS) (TMS) S. Bart S. Bart commissioning TE-VSC:

Dry Run BE-BI + S. Bart Pedersen Pedersen S. Bart Pedersen measurement BE-OP Pedersen on the magnet (BCTDCPSB) 15L1 (length of A.Topaloudis vacuum P.Odier chambers) J.Somoza Dry Run BE-BI + BE-OP: transfer lines Dry Run BE-BI + BCTTRIC, BE-OP BCTFPS (BCTs) (BPMBE) BE-BI + BEJ-C Allica A.Topaloudis BE-BI + BE-OP: OP: Santamaria BE-BI + BE-OP: BE-BI + BE-OP: BPMPSB (TMS) BPMPSB A.Topaloudis BPMPSB (TMS) BPMPSB (TMS) commissioning (TMS)

S. Bart commissioning S. Bart S. Bart Pedersen S. Bart Pedersen TE-MSC: Pedersen Dry Run BE-BI + Pedersen Audio Patrol BE-OP: Mains (BTVI) A. S. Burger Newborough A.Guerrero Link between the Planning tool and the Checklist. Fri Sat Sun Dry Run BE-BI + BE-OP (BQSB) M.Gasior Dry Run BE-BI + BE-OP (BEMCPS) A.Guerrero Dry Run BE-BI + BE-OP (BWSINJ) AG + FR Dry Run BE-BI + BE-OP

(BPMLN4) A.Guerrero M.Bozzolan Abdelouahid AKROH / BE-OP-PSB 12-Dec Mon 9 Developed by an OPerator Machine Checklist NEW:Basic Online Machine Checklist. OLD: and laborious Microsoft Word checklist PATH TEST TESTS TARGETS TARGET Statistic view to have an overview of the status of the machine re-commissioning. Tree Table view prepared by the checklist Test view filled in by all the Booster operators

Administrators: (Recommissioning coordinators). on shift during the re-commissioning period. Abdelouahid AKROH / BE-OP-PSB PATHS 10 Importance of a good recommissioning RESTART 2016-17: Huge De-cabling/cabling campaign took place in the Booster machine: 4332 cables pulled-out, and 0.7% were cut by error (32 cables). 01/03/2018 Dry Runs during the recommissioning allowed to get used with new equipment. 3 weeks 2 weeks Hardware Re-commissioning allowed to overcome very critical problems at the restart. RESTART 2017-18: Mainly for LHC injector upgrade advancement: New SEM-grid, new Tune pick-up, WIC (Warm Interlock Control) for the magnet protection, few magnets polarity check... Abdelouahid AKROH / BE-OP-PSB 11/04/2017 11

OUTLINE I. LHC injectors complex III. Re-commissioning IV. Long Shutdown 2 works in the Booster V. 2020 machines preparation: Linac4/Booster VI. Summary Abdelouahid AKROH / BE-OP-PSB II. Long-term Schedule 12 PSB activities: surface and underground R U N 2019 DEC PSB Tests RP Cooling JAN X M A S FEB

MAR APR MAY JUN 2020 JUL SEP OCT PSB Surface + Underground work PSB Shutdown 15 months + 2 weeks of xmas break 2019-2020 SURFACE New Booster Power Supply tests on the magnets AUG NOV DEC JAN X M

A S FEB MAR APR H W T UNDERGROUND Abdelouahid AKROH / BE-OP-PSB 2018 NOV 13 OUTLINE I. LHC injectors complex III. Re-commissioning IV. Long Shutdown 2 works in the Booster V. 2020 machines preparation: Linac4/Booster VI. Summary Abdelouahid AKROH / BE-OP-PSB II. Long-term Schedule 14 Why Linac4?

3. Booster injection efficiency will drastically increase from 60% to ~99% (injection Chopped beam + charge exchange). 2. With the Linac 4, the luminosity of the LHC will increase, because the beam brightness will increase. Linac 4 has been fully commissioned from Long shutdown 1 (2013-2014) to end of 2016. Abdelouahid AKROH / BE-OP-PSB 1. The Linac 2 is 40 years old (1978), and is now accumulating aging problems. 15 March 2013 April 2014 August 2014 November 2015 June 2016 October 2016 3 MeV at the Test stand commissioning DTL1 installation:

12 MeV commissioning DTL tanks installation: 50 MeV commissioning CCDTL tanks installation: 102 MeV commissioning PIMS tanks installation: 160 MeV commissioning Beam Physics + Operation + Equipment experts Beam Physics + Equipment experts The 3 MeV test stand October 2016 HST (Half Sector Test). Gain experience on the future Booster H- injection. Operation CCDTL 16 Mid 2017- Now DTL PIMS Abdelouahid AKROH / BE-OP-PSB

Linac 4 commissioning before Long shutdown 2. Linac4 Reliability Run. Making Linac4 as ready as we can before the connection To PSB Booster restart planning 2020 PSB Shutdown MAY JUN JUL PSB Hardware Tests (4 months) 4 months of Booster Hardware tests. The Operation team organizes & plan machine interventions and tests. AUG SEP Cold Checkout (1 month) OCT

NOV BeamCommissioning (2.5 months) DEC RUN X M A S 2.5 months of beam commissioning. The Operation team tests equipment with beam and set-up first beams for the users. 1 month of Cold Checkout. The Operation team tests all the equipment of the machine without beam. Abdelouahid AKROH / BE-OP-PSB MAR APR 17 Hardware tests Hardware tests will mainly be done by equipment experts. Some equipment will have to be tested in collaboration with operation group, e.g. OASIS (Open Analog Signal Information System).

Orga nise So lve Solve Repo rt Recommissioning Coordinators & Booster Operators OASIS SUPPORT TEAM Report Abdelouahid AKROH / BE-OP-PSB The aim will be to check all the cabling distribution from the Source to the OASIS front-end computer, after a huge cabling and de-cabling campaign: 18 EQUIPEMENT EXPERTS Check of the control system We will have to test the complete Control Architecture: Test of accelerator equipment with their entire control chain Front-End class OK

LSA setting management ok Abdelouahid AKROH / BE-OP-PSB Application has not appeared 19 The Control Architecture is one of the key element for operation. During the re-commissioning many issues can be identified and solved. Machine checkout Ring Beam Current Transformer Beam Instrumentation Specialist Abdelouahid AKROH / BE-OP-PSB We will have to plan few Dry Runs: Complete process of testing equipment without beam: 20 The operation team will perform dry runs for all equipment that have been modified or changed, and issues like wrong cabling, wrong calibration or missing timings, could be identified. Beam commissioning The Beam commissioning will follow a checklist and a planning: Checking of all instrumentations with beam.

Check the RF parameters for the longitudinal characteristics of the beam. Test the Watchdog interlock (check beam transmission thresholds between two BCTs). Prepare Low and High intensity beams for LHC, ISOLDE, PS and SPS. nt e r e cur cycl am e Be ng th alo Low intensity: After the Long Shutdown1.2,LHC theindiv. priority -> 1 bunch onLimit: ring 3: 1.2E11 75% will be to prepare a PROBEprotons. beam (very LHC protons multi-> 4 )bunches: 1.6E12 small beam: 1 bunch with2.5E9 protons/bunch. for the LHC first beam injection. am e B se s

Lo s Abdelouahid AKROH / BE-OP-PSB 1. 2. 3. 4. High intensity: 3. ISO GPS/HRS -> 4 bunches: 8.3E12 protons/bunch. 4. SPS Fixed Target -> 8 bunches: 2E12/bunch 21 Beam TV OUTLINE I. LHC injectors complex III. Re-commissioning IV. Long Shutdown 2 works in the Booster V. 2020 machines preparation: Linac4/Booster VI. Summary Abdelouahid AKROH / BE-OP-PSB II. Long-term Schedule 22 We are still giving it all we can and will continue to give it

all!!! Abdelouahid AKROH / BE-OP-PSB LHC Long Shutdown 2 will imply an important injectors upgrade. Recommissioning of the Booster with the new Linac 4 connection will be paramount. LHC future performance will largely depend of a good restart of the CERN injector complex. The new tools and our experience for re-commissioning will be crucial for a smooth restart of our machines. 23 B. Mikulec (PSB section leader) F. Chapuis (CPS shift leader; 2nd PSB recommissioning Coordinator) E. Matli (ISOLDE supervisor; Web Developer) B. Urbaniec (Computing Engineer in the Control Group; Web Developer) THANK YOU FOR YOUR ATTENTION! Abdelouahid AKROH / BE-OP-PSB Special thanks:

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