Transcript Status of AWAKE laser line installation-30May2016

Status of AWAKE Laser Line Installtion
For the EN-STI Management Board - 30 May 2016
Presented by Valentin Fedosseev
Laser lines in AWAKE
• Laser beam line to plasma cell
– l = 780 nm
– t pulse = 100-120 fs
– E = 450 mJ
• Diagnostic beam line (“virtual plasma”)
 l = 780 nm
- t pulse = 100-120 fs,
- E ≈ 5 mJ
• Laser beam line to electron gun
– l = 260 nm
– t pulse = 0.3-10 ps
– E = 0.5 mJ
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Functional scheme of main laser lines
Mirrors for electron beam line ME1 – ME4 - All in air
ME1
LSSE2
VE1
ME2
Photoinjector
LSSE1
THG
ME4
ME3
Delay line
Vacuum tanks with mirrors
Vacuum tanks:
VP1 = 420100
VP2 = 420200 identical
VP3 = 420300
VP4 = 412312 2 mirrors
inside
Shutters and dumps
LSSP1 – in air
LSSP2 = 420255
LSSP1, LSSP2, LSSE1, LSSE2 – Laser Safety Shutters for proton and electron beam
lines
LBDP1, LBDP2, LBDP3 – Laser Beam Dumps for proton beam line
MP1- MP5 – Mirrors for proton beam lines (IN VACUUM)
ME1- ME4 – Mirrors for electron beam line
VP1 – VP5, VE1 – Vacuum vessels for proton and electron lines
LBDP1 = 412322
LBDP2 = 412424
LBDP3 = 412443
LSSE1 – in air
LSSE2 – in air
Driven by
compressed
air
Driven by
step
motors
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Laser elements in layout drawings
Vacuum tank 412312
With mirrors MP4, MP5
SPSLAWK_0015
Vacuum tank 420200
with mirror MP2
Vacuum tank 420255
with laser shutter LSSP2
Vacuum tank 420300
with mirror MP3
Vacuum tank 420100
with mirror MP1
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Laser elements in layout drawings
SPSLAWK_0006
T-cross tank 412322
With laser beam dump LBDP1
Vacuum tank 412312
With mirrors MP4, MP5
Vacuum tank 420300
with mirror MP3
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Laser elements in layout drawings
SPSLAWK_0007
Vacuum tank 412443
With laser beam dump LBDP3
Vacuum tank 412424
With laser beam dump LBDP2
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Laser room
Completed:
– Infrastructure of the laser lab
Electricity, CV, cabling, Ethernet, GSM, compressed air
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Vacuum beam line to SPS beam
Access hardware
Laser beam control hardware
Laser tables
Laser
Laser firm Amplitude and MPI Munich
Pulse compressor
Beam transport optics
To install :
– Laser beam diagnostics
– Laser beam shutter LSSP1
– RF timing hardware
EN-STI
BE-RF
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Laser room photos
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December 2015 - Ready for laser
February 2016 – Laser delivered
March 2016 – Compressor tank delivered
April 2016 – Laser and compressor installed
May 2016 – Laser beam transport optics
installed
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Remarks to laser installation
• Laser system has been delivered from Munich within the schedule
margins.
• Delivery of Compressor vacuum tank was delayed by 3 months
because of non-conformity of vacuum test procedure.
• Vacuum test have been performed at CERN: results do not fulfil
specification => baking at 80⁰C was applied
• Work on laser setup by Amplitude was delayed until the compressor
tank was accepted as it is.
• Another baking of the compressor tank was applied in the laser room
before installation of the optics. Now vacuum is good: 1x10-7 mbar
• A special heat exchanger for laser water cooling has been constructed
by EN-CV.
• Laser safety visit was arranged before the start of work with laser:
EDMS document 1688452 currently “in Work”, to be approved before
DSO test.
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Laser beam to plasma
Pulse
compressor
under vacuum
MP4
Beam
diagnostics
setup
MP5
MP3
MP2
MP1
Mirror with a
CCD camera
behind
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Standard mirror chamber VP1
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Assembly for merging of the laser and proton beams
Mirror mount assemblies installed into all vacuum tanks (April - May 2016).
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Laser beam transport
Installed:
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Vacuum tanks for mirrors
Merging tank
Laser safety shutter LSSP1
Supports for optical delay line
Optical table for beam diagnostics
Control cables
LBDP1 modified for injection of alignment laser
Beam transport optics
Laser shutter control
Laser beam dump LBDP1
To install:
– Laser beam dumps LBDP2 and LBDP3
• Parts to be delivered from MPI in this week
– Diagnostics hardware
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Laser beam transport photos
Merging
tank
Diagnostics table
Laser safety shutter
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Delay line for beam diagnostics
• Parts produced
• Ready for installation /
partially installed
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Integration of laser into the SPS access system
Sectorisation of the AWAKE area
Cabling scheme for EIS
Access is restricted to laser experts and laser users:
Sector 7 – all the time
Sector 3 – during the setup of laser beam to plasma cell
Sector 6 – during the setup of laser beam to photoinjector
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Laser shutter control
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Power supply for all laser safety shutters
“Retour veto” functionality for all shutters.
Pass-through of end switch signals (SAFE
A/B/R, UNSAFE, Presence cable A/B) from
the laser safety shutters to the access
system. Generation of these signals for
shutters, which are not capable to provide
all these signals.
Local control of primary shutters from
shutter switches in TT41, TCC4 and the
electron gun room during laser access.
Remote control of the primary shutters
during beam operation.
Monitoring and logging of shutter status.
Specifications of laser beam shutters:
EDMS document 1583957 (In Work)
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Laser safety shutters
LSSP2 – in vacuum
LSSP1, LSSE1, LSSE2 2 – in air
Bottom platform is to be modified
for installing 4 end-switches
Based on VAT “Beam stopper insert”
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Being constructed by E. Grenier-Boley (STI/TCD)
Laser power interlock
Algorithm to check that laser is
in low power mode
ENABLE1
SAFE1
SAFE2
ENABLE2
Before plasma
•
Transmission of ENABLE1,
ENABLE2 to BI and MPP
equipment to permit insertion
of screens
Acquiring of SAFE1, SAFE2 from
BI and MPP equipment to
permit high energy laser pulse
After plasma
•

BTV.412350

BTV.412353

MPP CTR screen

MPP OTR screen 2

BTV.412426

BTV.412442
Specifications are being prepared by Joshua Moody (MPI): EDMS 1687867 “In Work”
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Controls of laser beam line
Real-time FESA will be used for all laser beam elements, except the laser itself
which has own local control interface accessible via standard remote desktop
control tools.
Connected to locally installed PLC:
•
Laser shutters and dumps
Connected to a remote Front-End Computer
via CERN Technical network (Ethernet) :
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Filter wheels
Flip mounts
Mirror translator in air
Interlocks
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Laser energy meters
Pico-motors controllers of mirror mounts
SmarAct mirror translator controller
Connected to a National Instruments PXI:
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GigE digital cameras
Specifications for laser beam electronics & control system: EDMS 1687846 “In Work”
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Acknowledgements
EN-STI-LP
Christoph Hessler, Misha Martyanov, Eric Chevallay,
Florence Friebel
EN-STI-ECE
Alessandro Masi, Thierry Feniet, Krzysztof Szczurek,
Pierre Gander, …
EN-MME
Nicolas Chritin, Cedric Delory
EN-MEF
Ans Pardons, Frederic Galleazzi, Vincent Clerc, Marzia
Bernardini, Michel Arnaud, Patrick Vincent, Yannick Grislain
EN-CV
Michele Battistin, Frederic Teixeira, Daniel Lefils
EN-EL
Guillaume Gros, Thierry Charvet
EN-HE
Jean-Louis Grenard, Franck Daclin
GS-SE
Richard Morton, Alex Selles
GS-ASE
Vitor Martins De Sousa Dos Rios, Didier Vaxelaire
MPI Munich
Patric Muggli, Joshua Moody, Mathias Hüther
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