Vacuum controls of the NA 62 experiment Fernando

Vacuum controls of the NA 62 experiment Fernando Mateo TE-VSC-ICM 2014 -11 -20 NA 62 vacuum controls, F. Mateo TE-VSC-ICM 1 of 14

q Introduction q Experimental layout q Vacuum equipment layout q Controls architecture q Control crates q Racks layout q Interlocks q Software q PVSS SCADA application q Commissioning 2014 -11 -20 NA 62 vacuum controls, F. Mateo TE-VSC-ICM 2 of 14

Introduction NA 62 is a fixed target experiment in the SPS North Area to study very rare decays of Kaons. It is a follow-up experiment of NA 48 and it reuses a large amount of its equipment. LOCATION: SPS North Area (Bld. 911 – 918. Site of Prévessin) 2014 -11 -20 NA 62 vacuum controls, F. Mateo TE-VSC-ICM 3 of 14

Experimental layout Vacuum sectors: 1. T 10 TAX 2. TAX CEDAR 3. CEDAR Fast Gate Valve (99 m) 4. Fast Gate Valve (105 m) 5. Decay volume + RICH (105 m-240 m) 6. LKr-Monotube (240 m-243 m) 7. Gate Valve Dump & SAC 2014 -11 -20 NA 62 vacuum controls, F. Mateo TE-VSC-ICM 4 of 14

Vacuum equipment layout Passive gauges, no Profibus Active gauges, Profibus > 200 intruments (gauges, valves, pumps) Vacuum layout : EDMS 1281885 Instruments list: EDMS 1790075 2014 -11 -20 NA 62 vacuum controls, F. Mateo TE-VSC-ICM 5 of 14

Controls architecture Profibus I / A / T Optical network OLM (VRJCP 006) PLC master (VRLMS) Remote I/O (VRLRG) VRGPT 300 Fast valve controller (VRVRC) OLM (VRJCP 006) Primary pump controller (VRPPH) Remote I/O (VRLRG) Turbo group controller (VRPGMF) Profibus gateway (VRJCP 007) Remote I/O (VRLRG) Cryo group controller (VRPYA) … DA valve controller (VAT_VP 3) VGMB VGM / VGF VGPA Primary group (VPGR) 2014 -11 -20 VGRA Fast valve (VVQ) Special DA valve (VVX) Roughing pumps (VPR) Turbomolecular group (VPGT) NA 62 vacuum controls, F. Mateo TE-VSC-ICM VGF VV Cryogenic group (VPGC) 6 of 14

Control crates Commercial crates CRATE STANDARD NAME VRPP VRVRC VRGPT 300 VAT_VP VRPYA DESCRIPTION Primary pump local crate VAT VF-2 Fast Valve Controller Gauge controller Dual acting valve controller HSR PCA 700 C Cryo controller UNITS 5 1 5 2 7 DESCRIPTION PLC Master PLC Remote I/O station type a PLC Remote I/O station type b PLC Remote I/O station type c PLC Remote I/O station type d Turbo pump controller Primary pump controller Turbo pump patch panel UNITS 1 1 1 8 2 5 Custom-made crates CRATE STANDARD NAME VRLMS VRLRG type a VRLRG type b VRLRG type c VRLRG type d VRPGMF VRPPH VRJTB 2014 -11 -20 NA 62 vacuum controls, F. Mateo TE-VSC-ICM 7 of 14

Racks layout ECN 3 cavern. Positions of VAC racks measured from T 10 target. Z (m) VAC-06 (240. 6 m) VAC-05 (215 m) VAC-04 (190 m) VAC-03 (177. 2 m) VAC-02 (176. 6 m) VAC-01 (176 m) FO patch panel Cryo pump controller Remote I/O Cryo pump controller VAT VP 3 TPG 300 OLM TPG 300 2014 -11 -20 OLM Remote I/O Primary pump controller VF 2 Fast Valve controller VAT VP 3 UPS Primary pump controller Turbo pump controller Profibus gateway NA 62 vacuum controls, F. Mateo TE-VSC-ICM Cryo pump controller Turbo pump controller Cryo pump controller Remote I/O 8 of 14

Interlocks TYPE NAME DESCRIPTION IN NA 62. Di. Enable. Pump. S 2 S 3 Pumping Enable for Sector 2 and 3 (if no CEDAR window rupture) IN Venting Enable of Sector 2 and 3 (if CEDAR at atmosphere pressure). NA 62. Di. Enable. Vent. S 2 S 3 NOT CEDAR vacuum status on DIP published safety information. AVAILABLE!! OUT NA 62. Do. Alr. S 2 S 3 Vac. Ok Enable Inside CEDAR pumping (if S 2 and S 3 are under vacuum) OUT NA 62. Do. Alr. S 3 S 4 Vac. Ok Enable GTK cooling (if S 3 and S 4 are under vacuum) OUT NA 62. Do. Alr. S 5 Hv. Ok Enable High Voltage on LAV (if S 5 atmosphere or under high vacuum) OUT NA 62. Do. Alr. S 5 Rich. Ok Enable Inside RICH pumping (if S 5 is under vacuum) OUT NA 62. Do. Alr. S 7 Hv. Ok Enable High Voltage on SAC (if S 7 atmosphere or under high vacuum) 2014 -11 -20 NA 62 vacuum controls, F. Mateo TE-VSC-ICM 9 of 14

Software Many PLC functions have been reused from other systems (LHC): • Primary groups • Turbo groups New functions have been developed for: • Cryo controllers • Profibus gauges • Specific interlocks (HW/SW) 2014 -11 -20 NA 62 vacuum controls, F. Mateo TE-VSC-ICM 10 of 14

PVSS SCADA application All vacuum equipment has been included in Vac. DB. The PVSS application was developed in Win. CC OA. 2014 -11 -20 NA 62 vacuum controls, F. Mateo TE-VSC-ICM 11 of 14

Commissioning June 2014: • Fiber optic network test. Communication with PLC master. • Roughing pumps test. Communication with VRPPH controllers. July 2014: • HW commissioning & leak test of blue tube • Profibus network test September-October 2014: • Full pump-down with remote control system • Interlocks test November-December 2014: • Documentation Issues found and solved: bad connectors/cables, conventions mismatchs, cabling errors inside crates, profibus instabilities… 2014 -11 -20 NA 62 vacuum controls, F. Mateo TE-VSC-ICM 12 of 14

Conclusions Ø NA 62 was a challenging experiment which involved dealing with a large variety of equipment and required the collaboration of several groups and sections of CERN. Ø Vacuum controls were a success: robust vacuum and nominal pressures achieved in all sectors. Ø Interlocks are fully operational. Ø The planning was strictly followed and deadlines were respected. Ø Few things to fix: • Membrane gauge transfer function correction. • Add relay boxes for VAT VP-3 controllers. • Extra interlocks to be implemented? (2015 technical stop). • Backup primary groups to be installed in sectors 1 -2. • Reorganize racks cabling, etc. 2014 -11 -20 NA 62 vacuum controls, F. Mateo TE-VSC-ICM 13 of 14

Thank you! Special thanks to: • Abel / Rodrigo / Sebastien / Berthold Jenninger for support during commissioning. • Sebastien / Rodrigo for PLC software development. • Victor de Jesus (EN-MEF) for equipment installation. 2014 -11 -20 NA 62 vacuum controls, F. Mateo TE-VSC-ICM 14 of 14