Gregory Fries NSLSII Accelerator Division Project Engineer SST ID amp FE IRR November 8 2017 Outline Scope Machine Status amp Operating Schedule Source amp Straight Layout ID Refurbishment ID: 680409
Download Presentation The PPT/PDF document "SST Source & Front End Overview for..." is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
Slide1
SST Source & Front End Overview for IRR
Gregory Fries, NSLS-II Accelerator Division Project EngineerSST ID & FE IRRNovember 8, 2017Slide2
Outline
ScopeMachine Status & Operating ScheduleSource & Straight LayoutID RefurbishmentSource & Straight Installation & ReadinessFront End (FE) LayoutFront End
Development,
Installation & Readiness
Radiation Safety
Source & FE Commissioning Plan
ConclusionSlide3
Scope
SST
(7-ID) Source
One U42 undulator (refurbished)
One EPU60 (refurbished
)
Straight Section
EPU vacuum chamber
Canting Magnets (permanent magnet)
RF BPMs
SST
Front End
One canted insertion device (ID) front
end
X-BPMs were removed from the scope due to cost
The photon & safety shutters will remain locked out during commissioning and do not yet require wiring into PPS & EPSSlide4
Machine Status & Shutdown Schedule
Installation, testing & commissioning
dependent upon operating schedule
NSLS-Il beamline operations in process
Three machine shutdowns per year (4-5 weeks each)
Dec/Jan
April/May
August
Typically a
two-day
maintenance period every
third
week
& a studies period every week during
operations
Minor
installation & testing during maintenance days
Installation completed
during
Aug ‘17
shutdown
Commissioning scheduled for
Nov
‘17Slide5
Operating Schedule
Shifts for
SST ID & FE
CommissioningSlide6
SST ID & Straight Layout
Courtesy of B. Kosciuk
Beam
U42 Undulator
EPU60
Canting Magnet (3x)
RF BPMs
EPU chamberSlide7
U42 Undulator Refurbishment
Previously used device from ESRF
Specifications
1.6m long, 42mm period
0.79T nom.
p
eak field, 2.9kW nom.
m
ax power
A new control system
required
to meet NSLS-II
standards
New motor, drivers, gearbox, encoders & limit switchesNew manufactured parts for mechanismKill switches & home switches added
Correction coils addedE-stops & beacons addedMagnetic measurements performedSlide8
EPU60 Refurbishment
Previously used device
from SRC Wisconsin
Specifications
0.89m
long,
60mm
period
N
om
. peak
field – V: ~0.79T, H: ~0.45T
Nom. max
power – LH: 1.4kW, LV: 0.51kW, C: 0.74kWA new control system required to meet NSLS-II standardsA new plinth required
to bring EPU to the proper beam heightNew limits switchesKill switches
addedNew motorE-stops & beacons addedMagnetic measurements performedSlide9
Straight Section
EPU vacuum chamber procured from FMB
Berlin
Received in Nov. ’16
Leak checked & pre-surveyed prior to installation
S
tandard RF
BPM
buttons, SiO2 cables, & electronics
Canting
magnets
procured
from
VacuumschmelzePermanent magnets; no power supplies or water coolingMeasured & shimmed by ID groupSlide10
ID & Straight Section Installation
Dec/Jan ‘16 Shutdown
Installed
EPU vacuum chamber & RF BPMs
Baked
& surveyed straight
section
April/May
‘
17 Shutdown
Installed U42 into SR tunnel
Installed U42 electronics rack & cables
Locked
o
ut
U42
(full open gap) until IRR
approval
Aug ‘17
Shutdown
Installed
EPU60
into SR tunnelInstalled EPU60 electronics rack & cablesInstalled canting magnets (adjusted lattice upon machine startup)Final survey of SST straight, IDs, & canting magnetsTesting controls In-situ
Locked U42 & EPU60 (full open gap) until IRR approvalSlide11
SST ID Straight
Actions
Specifications defined.
Design complete.
Design reviews completed and all actions resolved.
Devices under configuration management.
Magnetic fields measured.
Mechanical travel tested.
Water flow measured.
N/A
EPS tested.
Travelers developed and approved.
Travelers completed.
Note that there is no cooling water to
IDsSlide12
Safety Features of NSLS-II Insertion Devices
Various safety features have been implemented for all IDs:Brakes in motorsBrakes are on when there is no powerSelf-locking gearsGap will not close by attractive force onlyPilot lamp during gap/phase motionWarns people in the vicinity of the device that it is in motionLexan cover for magnetic gaps and external pinch points
Covers from both inner and outer side of a device.
EPS Switch
M
echanical
switch on the
ID
independent from control system for “gap open” status is integrated into EPS
LOTO
procedures during maintenance
Written procedure for each type of the device for lock-out and tag-outSlide13
SST Front End Layout
Slow Gate Valve
Fixed Mask
Collimator 1
X-Y Slits
Collimator 2
Fast Gate
V
alve
Ratchet Wall Collimator
X-BPMs (on hold)
Safety Shutters
BM Photon Shutter
Beam
Courtesy of C. Amundsen
Flag
Photon ShutterSlide14
Front End Development
Most components are identical to previous ID front ends
First canted beamline with two
undulators
Synchrotron fans overlap each other at fixed mask
Original fixed mask has a center web between the two apertures
Required new fixed mask design
FDR for new fixed mask occurred in Oct. ’16
New design is more adaptable, generic, & easier to manufacture
A prototype was produced to validate the machining process
ANSYS analysis & weld testing
were performed
Minor upgrade to slit blade design
Better thermal transfer & easier assembly
Front end ray tracing approved & releasedSlide15
Radiation Safety & Top-Off
Radiation safety components:
Exit absorber
Fixed mask
Burn thru flanges #1 & #2
Collimators #1 & #2
Safety shutters #1 & #2
Ratchet wall collimator
Top-Off components:
Exit Absorber
Fixed mask
Collimator #2
Credited controls include all shielding & PPS components
Removal
or modification of any device under configuration control r
equires an approved PS safety system work permit Slide16
Front End Installation
Dec/Jan ‘16 Shutdown
Installed ratchet wall collimator & safety shutters
Installed front end stand assemblies
Pulled cables
April/May ‘17 Shutdown
Installed exit pipe & bending magnet photon shutter
Installed remaining front end components
Terminated
cables
Plumbed
DI water & compressed
air
Aug ’17 Shutdown
Tied-in front ends into EPS & PPSBaked & final surveyed front endFinal
integrated testing & labelingLocked out shutters until IRR approvalSlide17
SST Front End
Actions
Ray
tracings complete.
Design
drawings complete
.
Vacuum system complete.
Final survey
complete
.
Devices under configuration management.
Integrated testing complete.
Water flow measured.
Travelers complete.
Top-off analysis complete.
EPS verification.
PPS verification.Slide18
Commissioning Plan
Commissioning scheduled for
Nov
. ‘17
Commissioning
studies time
has been reserved
Commissioning effort will include staff from Operations, Physics, Insertion Device, Front End, and Diag. groups
Software controls & tools already developed and verified during NSLS-II beamline commissioning
Procedures released for ID & FE commissioning sequence and radiation survey plan
FE
similar
design at NSLS-II Project, ABBIX, &
NEXTIDs similar to other EPUs at NSLS-IISlide19
Insertion Device Commissioning
Beam current
below 2 mA
Verify orbit and characterize/correct lattice
Reduce ID
gap of one device
Generate orbit correction feed-forward (lookup) table
Inject with ID gap closed, improve injection
efficiency
General radiation
survey
Repeat for second ID (with first ID gap open)
Authorization
proceed to FE commissioningSlide20
Front End Commissioning
Photon shutter & safety shutters remain locked out
Beam current
below 2 mA
Verify orbit and characterize/correct
lattice
Verify active interlock functionality
General radiation surveys
Align the photon beam using flag
Record slit positions with respect to beam center
Condition vacuum
Radiation
survey (fault study
)Hold point – before increasing currentSlide21
Beam Current Increase Plan
Obtain authorization to increase current to 120 mA Photon shutter & safety shutters remain locked outEvaluate and record current machine stateGradually increase current
Verify
active interlock system
being engaged
Monitor and verify orbit, tunes, lattice, vacuum, temperature
Hold Point – Radiation
survey
Phase 1 (slits open
)
Phase 2 (slits closed)
Phase 3 (fault studies)Beam conditioningRepeat to
allowable currentSlide22
Conclusion
Refurbished IDs have been brought up to NSLS-II standards
SST insertion devices & front
end installed & tested
Radiation components under configuration control
Assembly drawings, ray tracings, procedures, & travelers are available
Photon shutter & safety shutters are locked in the down
position
U42 & EPU60 IDs are locked out with the gaps fully open
SST IDs & front
end
are
ready for commissioningNo self-identified pre-starts
Commissioning experience & prepared commissioning procedures from previous IDs & front endsSlide23
Back-up SlidesSlide24
Front End Details
A front end delivers the photon beam to the beamline while controlling the sizes of both the synchrotron and bremsstrahlung radiation fans.
The
fixed mask shadows the vacuum chambers of downstream
collimators
and safety shutters for beam deviations controlled by active
interlock.
Lead
collimators trim
the Bremsstrahlung fan exiting to beamlines.
Photon shutter is used to stop the photon beam in order to protect the uncooled safety shutters.
The safety shutters block the bremsstrahlung radiation from exiting through the
ratchet wall collimator
chamber opening.The photon shutter & safety shutters are locked out. (Centrally controlled LOTO)SST is similar
design to NSLS-II Project, ABBIX, & NEXT front ends