Requirements for the Interlock System of the Phase1 beam line

Janet Schmidt on behalf of CP3

2

Functional scheme of main laser lines

2

LSSP1, LSSP2, LSSE1, LSSE2 – Laser Safety Shutters for proton and electron beam linesLBDP1, LBDP2, LBDP3 – Laser Beam Dumps for proton beam lineMP1- MP5 – Mirrors for proton beam lines (IN VACUUM)ME1- ME4 – Mirrors for electron beam lineVP1 – VP5, VE1 – Vacuum vessels for proton and electron lines

Photoinjector

LSSE2 VE1

LSSE1

ME1 ME2

ME3ME4

THG

Delay line

CERN Naming of shutters and dumps

LSSP1 = TOSWB – in airLSSP2 = TOSWA in vacLSSE1 = TOSWB – in airLSSE2 = TOSWB – in air

LBDP1 = TODWA in vacLBDP2 = TODWB in vacLBDP3 = TODWC in vac

BTVs

F

LSSP2

LBDP1

LBDP2

B2B1B4

B3

F = Movable Filter with end switch

Laser dumps

LBDP3

Layout of Beam Lines

TRUTH Table For LASER

LASER TO LINE LSSP2 OUT V OUT

LOW POWER (default) F IN Diagnostics LBDP1 IN OUT IN OUT LBDP2 OUT OUT IN IN B1 IN/OUT IN/OUT IN/OUT IN/OUT B2 IN/OUT IN/OUT IN/OUT IN/OUT

B3 IN/OUT IN/OUT IN/OUT IN/OUTB4 IN/OUT IN/OUT IN/OUT IN/OUT

FULL POWER (by request) F OUT Diagnostics LBDP1 IN OUT IN OUT

LBDP2 OUT OUT IN IN B1 IN/OUT OUT IN/OUT OUT B2 IN/OUT OUT IN/OUT IN/OUT

B3 IN/OUT OUT IN/OUT IN/OUTB4 IN/OUT OUT IN/OUT IN/OUT

Type Name

F Filter / Indicator for Laser Power (tbd) To be defined

LSSP2 Laser Shutter TOSWA.420255LBDP1 Laser Dump upstream plasma TODWA.412322LBDP2 Laser Dump downstream plasma TODWB.412424LBDP3 Laser Dump downstream plasma TODWC.412443

V Valves (CERN + MPP)VVGS.420306, VVGS.412354, VVGS.412424,6x MPP

B1 2 Screens upstream plasma BTV.412350, BTV.412353B2 1 Screen downstream plasma BTV.412426B3 Diagnostic MPPB4 1 Screen (SMI diagnostic CERN) BTV.412442

Local System

B2

LBDP2

B4Plasma

LBDP1LSSP2

LBDP3

Commissioning and Operational Modes For LASER

Mode Laser Power Laser Shutter Laser Dump Screens

Set up only laser Low/High LSSP2 IN LBDP1, LBDP2,LBDP3 IN/OUT B1, B2, B3, B4 IN/OUT

Set up laser beam in TT41

Low LSSP2 OUT LBDP1, LBDP2 LBDP3

IN/OUTIN B1, B2, B3, B4 IN/OUT

High LSSP2 OUT LBDP1 LBDP2,LBDP3

ININ/OUT B1, B2, B3, B4 IN/OUT

Set up protons and laser Low LSSP2 OUT

LBDP1 LBDP2 LBDP3

OUTIN/OUTIN

B1, B2 B3, B4

ININ/OUT

Operation Phase 1 High LSSP2 OUTLBDP1LBDP2 LBDP3

OUTINOUT

B1, B2B3, B4

OUTIN/OUTIN

Operation Phase 2 High LSSP2 OUTLBDP1LBDP2 LBDP3

OUTOUTIN

B1, B2 B3, B4Electron spectrometer

OUTOUTIN

Local System

B2

LBDP2

B4Plasma

LBDP1LSSP2

LBDP3

TRUTH Table For Protons

Permit this SPS extraction

status nameValves (8) out CERN: VVGS.412354, VVGS.412424

out MPP valves/plunger: 6Laser dump LBDP1 (1) out TOSWA.420255

SPS BIC

Permit next SPS extraction

status nameBPMs around laser merging OK BPM.412311, BPM.412319BPMs before plasma cell OK BPM.412339, BPM.412352BLM at laser merging OK BLM.412356 BLM around plasma cell OK BLM.412356, BLM.412424

4x valve 4x valve

Summary

• The laser interlock system should be a local system, checking the status of screens and valves according to the laser power and shutter status.

• The required interlocks for the proton line are defined, including BMPs, BLMs and valves.

• For the electron transfer line, only the valve needs to be interlocked. Requirements of the source will be defined on a later stage.