Gregory Fries NSLSII Accelerator Division Project Engineer FXI IRR October 18 2017 Outline Background Return to Operations Scope Machine Status amp Operating Schedule Front End FE Details ID: 686987
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Slide1
FXI Front End Overview for IRR
Gregory Fries, NSLS-II Accelerator Division Project EngineerFXI IRROctober 18, 2017Slide2
Outline
BackgroundReturn to OperationsScopeMachine Status & Operating ScheduleFront End (FE) DetailsFront End Layouts, Installation & ReadinessRadiation SafetySource & FE Commissioning PlanConclusionSlide3
Background
FXI (18-ID) is a damping wiggler (DW) beamline
Operation of damping wiggler needed for SR operation (emittance
)
Requires bending magnet photon shutter to be open
Source & partial front end installed during NSLS-II project
Reviewed in Dec. ‘14 as part of Limited Scope Readiness review of NSLS-II Front Ends and Insertion Devices 08-ID and 18-IDIn use since the start of operationsInstall of remaining of front end components in Aug. ‘17Including ratchet wall collimatorNo changes to source or straight sectionSlide4
Return to Operations
Tailored review plan created to return to
operations on Sept. 5
Requirements to return to operations:
Ray tracing released
Shielding & radiation safety components installed & under configuration control
Vacuum bakeout completeMechanical survey completeWater flow verifiedEPS verifiedSlits LOTO’d open & shutters LOTO’d closedPresented to Radiation Safety Committee on Aug. 22
Conducted 18-ID front end readiness for operation review on Aug. 29
Phase 1 radiation survey upon restart of operations
Operating current slowly ramped upSlide5
Scope
FXI Front End
Insertion device (ID) front end
Many aspects already reviewed in Aug.
The photon & safety shutters are wired into PPS & EPS
FXI Source (DW) not explicitly included
May need reference information when reviewing front end and beamlineSlide6
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/MayAugustTypically a two-day maintenance period every third week & a studies period every week during operationsMinor installation & testing during maintenance daysInstallation completed during Aug ‘17 shutdownCommissioning scheduled for Oct/Nov ‘17Slide7
Operating Schedule
Shifts for FXI CommissioningSlide8
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)FXI is same design as NSLS-II Project, ABBIX, & NEXT front endsSlide9
Front End Layout
Beam
Ratchet Wall
Collimator (added)
Safety Shutters (added)
Fixed
Mask (new body)
Collimator
1
(added)
X-Y
Slits (added)
X-ray Flag (added)
Photon
Shutter (new body)
Fast Gate
Valve (added)
Collimator
2 (added)
Slow Gate
Valve
Courtesy of C. Amundsen
BM Photon ShutterSlide10
Radiation Safety & Top-Off
Radiation safety components:
Exit absorber
Fixed mask
Burn thru flanges #1 & #2
Collimators #1 & #2
Safety shutters #1 & #2Ratchet wall collimatorTop-Off components:Exit AbsorberFixed maskCollimator #2Credited controls include all shielding & PPS componentsRemoval or modification of any device under configuration control
r
equires
an
approved
PS
safety
s
ystem
w
ork
p
ermit Slide11
FXI Front End Installation
As part of NSLS-II project in ‘13
Installed exit pipe & bending magnet photon shutter
Installed original fixed mask & photon shutter
August ‘17 Shutdown
Installed ratchet wall collimator & safety shutters
Replaced fixed mask & Photon shutterInstalled slits, upstream collimators & flagPulled & terminated cablesPlumbed DI water & compressed airTied-in front ends into EPS & PPSBaked & final surveyed front endLocked out shutters until IRR approval
Sept. ‘17
Final integrated testing & labelingSlide12
FXI 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.Slide13
Commissioning Plan
Commissioning scheduled for Oct./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 commissioningProcedures released for ID & FE commissioning sequence and radiation survey planFE same design at NSLS-II Project, ABBIX, & other NEXTSlide14
Front End Commissioning
Photon shutter & safety shutters remain locked out
Beam current
below 2 mA
Verify orbit and characterize/correct
lattice
Verify active interlock functionalityGeneral radiation surveysAlign the photon beam using flagRecord slit positions with respect to beam centerCondition vacuumRadiation survey (fault study)Hold point – before increasing currentSlide15
Beam Current Increase Plan
Obtain authorization to increase current to 120 mA Photon shutter & safety shutters remain locked outEvaluate and record current machine state
Gradually increase current
Verify
active interlock system
being engaged
Monitor and verify orbit, tunes, lattice, vacuum, temperatureHold Point – Radiation surveyPhase 1 (slits open) – already completePhase 2 (slits closed)Phase 3 (fault studies) – already completeBeam conditioningRepeat to allowable currentSlide16
Conclusion
FXI 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
Front end is ready for commissioning
No self-identified pre-startsCommissioning experience & prepared commissioning procedures from previous front ends