Vacuum pumps for the ESRF EBS project Michael Hahn - DU RESEAU TECHNOLOGIES DU VIDE 3rd Rencontres Nationales - Réseau des ...
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3rd Rencontres Nationales
DU RESEAU TECHNOLOGIES DU VIDE
SEVRIER, 10–13 October 2016
Vacuum pumps for the ESRF EBS project
Michael Hahn
On behalf of the EBS Accelerator Project Team
OUTLINE
Project definition
- Machine issues and parameters
- Time schedule
- Logistics
Vacuum pumping
- UHV pump selection and constraints
- Vacuum assembly, chamber issues
- Installation and vacuum preparation (pre-pumping)
- Vacuum pump interface and control
- Bake out
Conclusion
Page 2
SCOPE OF THE PROJECT – ESRF TODAY
Energy 6.04 GeV
Storage ring circumference 844 m
10 Hz Booster
Synchrotron Multibunch current 200 mA
200 MeV Horizontal emittance 4000 pm.rad
Electron Linac
Vertical emittance 4 pm.rad
42 Beamlines
(including 14 Bending Magnet BL)
Page 3 3rd rencontres vide cnrs 10 – 13 October 2016
SCOPE OF THE PROJECT
Now EBS
Energy (GeV) 6.04 6
Multibunch current (mA) 200 200
Circumference (m) 844.39 843.98
Horizontal emittance (pm.rad) 4000 140
EBS.. Vertical emittance (pm.rad) 4 5
- Is going to be the new photon source (6 GeV electron storage ring) of the ESRF. The brilliance
of the generated X-Rays will improve by factors due to the reduced horizontal e-beam
emittance.
- Will contain 7 dipoles per cell (today 2), 7 x 32 = 224 dipole magnets
- Will replace the existing machine in the same tunnel
- Will be pre-assembled prior to installation which starts in Jan 2019
- Will contain 128 + 1 girders for magnets, vacuum chambers, etc.
- Will be an in-situ bakeable machine
- Will mainly use lumped (discrete) UHV pumping rather than functional coatings
- Will consist of stainless steel and aluminum vacuum chambers and use conventional flanges
Page 4 3rd rencontres vide cnrs 10 – 13 October 2016
SCOPE OF THE PROJECT
Now EBS
Energy (GeV) 6.04 6
Multibunch current (mA) 200 200
Circumference (m) 844.39 843.98
Horizontal emittance (pm.rad) 4000 140
Vertical emittance (pm.rad) 4 5
present
EBS
Dipoles-quadrupoles
Page 5 3rd rencontres vide cnrs 10 – 13 October 2016
MASTER PLAN
Courtesy of Pantaleo Raimondi
Page 6 3rd rencontres vide cnrs 10 – 13 October 2016
VACUUM PUMPS – SELECTION CRITERIA
Compactness
Good pumping speed for H2, N2, CO, CO2
Sufficient pumping speed for CH4, noble gases
Compatibility with existing installation
Reliability
Failure tolerance (power cuts)
Page 7 3rd rencontres vide cnrs 10 – 13 October 2016
VACUUM CHAMBERS (HIGH PROFILE)
- Production of 139 aluminum chambers started at CECOM, Italy
- Bi-metal Al2219/SS316LN has been selected for flanges
20
- Production of 159 HP Stainless steel chambers at FMB, Germany
20mm vert. internal height
- 316LN material flow from steel suppliers to producer started
- Production of 33 HP absorber chambers at Pink, Germany
- 316LN material flow from steel suppliers to producer started
CH3 CH14 (“absorber chamber”)
CH5
Production of Al dipole chamber at CECOM (Photo D. Gibson)
Page 8 3rd rencontres vide cnrs 10 – 13 October 2016
PROCUREMENT – VACUUM CHAMBERS (LOW PROFILE)
- Production of 102 low profile stainless steel vacuum
chambers at FMB, Germany
- 316LN material flow from steel suppliers to producer
started CH7
- Central curved sheet sections to be produced by
deep drawing
- Optimization of aspects like required thickness of
some of the sheets in collaboration with supplier
CH6
13
CH8
Page 9 3rd rencontres vide cnrs 10 – 13 October 2016
PROCUREMENT - INSTRUMENTATION AND CONTROL
322 NEG cartridge pumps and 21 activation controllers, contract
placed with SAES, Italy
- Lab test of pre-series completed
- Series production to be delivered end 2016 4 channel NEG activation controller
522 sputtering ion pumps and 50 IPPS
- Contract placed with AGILENT
- Pre-Series delivery received
76 RGA assemblies – Company proposed by tender board, sorting
remaining minor technical and contractual issues
100 l/s NEG pump
- AFC approval received
294 inverted magnetron (Penning) gauges and 160 Pirani gauges
200 l/s NEG pump
- Contract under preparation
Page 10 3rd rencontres vide cnrs 10 – 13 October 2016VACUUM ASSEMBLY
200 l/s NEG pump
Page 11 3rd rencontres vide cnrs 10 – 13 October 2016LOGISTICS (STORAGE AND ASSEMBLY BUILDINGS)
B1 - Architect view
Preliminary design in progress
B2 – Temporary storage
building
Page 12 3rd rencontres vide cnrs 10 – 13 October 2016INSTRUMENTATION AND CONTROL
Baking controllers compatible with fixing them on cable trays
16 control loops per unit
Prototype tested
Mechanics for 4 additional devices (pre-
series) arrived
Series production of 20 more to cope with
installation schedule
Page 13 3rd rencontres vide cnrs 10 – 13 October 2016GATE VALVES
Dimensional and vacuum test for RF sector valves prototype OK –
RF test with beam postponed
RFQ Custom shaped RF All Metal gate valves for SR sector
separation (pneumatic actuation) 69 units
RFQ Modified catalogue all metal valves for FE separation
(pneumatic actuation) 31 units DN63CF and 34 units DN100CF
Proposal of tender commission approved by DM, contract with
valve supplier pending AFC approval
Page 14 3rd rencontres vide cnrs 10 – 13 October 2016BAKING SYSTEM
Sheathed heaters selected as primary source
Tests of shaping insulation coats (aluminum
coated PI) ongoing by means of foam chamber
and magnet mockups
CFT Thermocouples under preparation
Purchase of heating collars being prepared
Foam vacuum chamber in foam 316L sheathed heater in dedicated Foam vacuum chamber in foam
magnet with thermal insulation (1) groove of aluminum chamber prototype magnet with thermal insulation (2)
Page 15 3rd rencontres vide cnrs 10 – 13 October 2016PREPUMPING FOR ASSEMBLY AND INSTALLATION
Traditional pumping groups with Hybrid turbo-
molecular pump, membrane pump, gauge
controller, PLC, etc. too space demanding for
EBS machine because of space constraints.
This is also to comply with safety standards
and European legislation (CE conformity).
A more compact pumping concept had to be
found..
Page 16 3rd rencontres vide cnrs 10 – 13 October 2016PREPUMPING FOR ASSEMBLY AND INSTALLATION
6 turbomolecular pumps attached
to pre-pumping valves of each
vacuum sector.
Backed by a dry pump.
Isolation valve in the exhaust
which closes when rotation speed
of turbo gets low, operated by
Turbo controller.
A trolley will transport controllers,
turbos, ACP etc., materials to be
installed on cable trays to keep
the walkway free.
Page 17 3rd rencontres vide cnrs 10 – 13 October 2016PRESSURE PROFILE
Expected conditioning after 1, 10, 100, 1000, 3000 Ah of beam
200 l/s NEG pump
Page 18 3rd rencontres vide cnrs 10 – 13 October 2016ID14 TEST OF KEY COMPONENTS
EBS Prototypes installed in a 6m ID straight section of ESRF:
- Straight aluminum chamber following EBS dipole chamber production principle(1)
- Bellow chamber containing two low profile RF liner assemblies(2)
- All metal pneumatic RF gate valve prototype(3)
- 1800mm NEG coated ESRF extruded Al ID chamber to fill up full length of SS (4)
3
1 2 4
Page 19 3rd rencontres vide cnrs 10 – 13 October 2016PROBLEMS AND LESSONS LEARNED FROM ID14 TEST IN AUGUST 2016
- Full aluminum flanges can create problems outside lab
environment
- Co-incidence of vacuum and RF gaskets on the flanges
complicates flange assembly
- With the same fixation hole pattern, RF gaskets for low
and high profile chambers could be confused
- Crossing welding seams on aluminum chambers
produced from two plates can create problems
Aluminum prototype chamber on ID14
- Given the amount of issues identified on this small test
assembly, it becomes obvious that the ‘mockup’
construction is very important
View from below, with leaking CF100 aluminum flange (IP)
Page 20 3rd rencontres vide cnrs 10 – 13 October 2016CONCLUSION
Contracts for the custom-shaped series production items (standard cell
chambers, valves, .. ) have been placed;
Design and procurement for one-of-a-kind items (injection and diagnostic
chambers, straight section adaptation, ..) is ongoing;
Procurement of vacuum instrumentation (UHV pumps, gauges, controllers, ..)
close to completion;
Still a lot of work for “consumables” ( screws, gaskets, heating collars and
connectors , thermal insulation, ..) ahead;
Page 21 3rd rencontres vide cnrs 10 – 13 October 2016MANY THANKS FOR YOUR ATTENTION Page 22 3rd rencontres vide cnrs 10 – 13 October 2016
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