Vacuum TAC2010 Amor

7/29/2019 Vacuum TAC2010 Amor

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SESAME Storage Ring Vacuum System

with Answers

to the Vacuum Review Committee

F. Makahleh on behalf of Vacuum Group

TAC 10, Allan, May, 10-11, 2010

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Vacuum Layout

133.2 m Circumference

16 Arc and Multipoles Chambers

8 SS (1.905 m F-F)

8 LS (3.67 m F-F)

16 RF Shielded Valves

24 RF Shielded Bellows

Booster

SR Cavity Straight

IR Chamber

6: RF shielded Valve


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Materials Selection

Chambers : S.St 316 LN, 3mm thick.

Excellent Weldability,

Low Magnetic permeability

Excellent Strength

Average Fabrication Cost

Firing is not needed.

E-beam and TIG welding

Absorbers : OFHC

Excellent Strength

High Thermal conductivity

Gaskets : Cop.

Suitable for CF and Flat Flange

Silver plated

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Dipole Chamber

Straights Chamber

70 x 28 30 x 14 L x 28

70 x 28 30 x 12 L x 28

Chamber Cross Sections (Dim in mm)

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Arc Chamber

5.4 m

Valve(@long straights)

Beam Direction

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3D Arc Chamber

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Long Straight Chamber

Straight Vacuum chambers

RF BellowRF Bellow

Absorber4

Short Straight Chambers

RF Bellow

Absorber5

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3D of Straight Sections

Long Straight (3.67 m) Short Straight (1.905 m)

DN 100 CF Flange

DN 100 CF Flange

DN 100 CF Flange

DN 100 CF Flange

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100% Lumped Absorber

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RF Shielded Bellow

Total length 115 mm.

No of convolutions 13.

Stroke

axial 10 mm.

lateral 1.8 mm.

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Beam Positioning Monitor (BPM) and RF Valve

BPM (L=3 cm)

DN 100

RF Valve

11To be Extended Actuator Type


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Pumps Locations

SIP5 150 l/sSIP6 150 l/sSIP7 150 l/s

SIP6 150 l/s SIP5 150 l/s

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Chambers to be manufactured

Chamber Type Quantity Estimated CostPer unit

(K)

Comments

Arc Chamber 16 70 Including BPMsIncluding Prototype

IR Arc Chamber 2 80 Height of 32 mmAnother Lot

Long Straight 5 12 Including Prototype

Short Straight 6 9 Including Prototype

RF shielded Bellows(115 mm)

24 5.5 Extra fingers will beordered

RF Shielded ValvesCF 100

17 24 Extra fingers will beordered

Absorbers (1,2,3,4)(Different Lengths)

76 1.75 Including PrototypeIncluding 8 spares

Total Budgeting Price 2067 RF, Injection and IDs

Chambers not included13


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Conductance calculated with MOLFLOW (R. Kersevan)

Pumping and Pressure profile is Optimized with Home Written MATLAB program

NEG pumps to give Extra pumping during startup.

Pumping and Pressure Profile

Thermal Desorption rate : 1 10 -11 mbar.l/s cm2

Total Produced Photons: 810 20 Photons/s

Photon Dose at 100 Ah: >10 25 Photons/m

Photon Yield (CO) : 110 -6 Molecules/Photon

Reflected Photons:10%

Total Pumping Speed: 23600 L/s Effective Pumping Speed: 11960 L/s

MATLAB is used to evaluate pressure using:

Ci (Pi-1 - Pi) + C i+1 (Pi+1 - Pi) + Qi = SiPi

For each element of 10 cm length. (i=1, 152)

C. Foerster, et.al,

J. Vac Sci. Technol. A19, 1652(2001).

Cu

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Pressure Profile @ 100AH

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P Average 1.1 (nT)

Distance (m)

Pressure(nT)


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Special Straights: Injection Straight sections

K1 K4

TL2

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Upstream Injection Section

K3

Stripeline BellowTaper

Taper

SIP 150 L/s

SIP 150 L/s

Beam Direction

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Injection Section

K1 K4

Septum

H Scraper

Taper

Below

SIP 150 L/s

SIP 150 L/s

SIP 150 L/s

Beam Direction

25

TaperSM


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Downstream Injection Section

BellowK2

Taper

SIP 150 L/s

V Scraper

Beam Direction26

Taper


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Special Straights: RF Section (Elettra Cavity)

Valve

TaperTaper

Beam Direction

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Special Straights: RF Section (EU Cavity)

Valve

Taper&Bellow

Taper

SIP 300 l/s SIP 300 l/sSIP 300 l/s

SIP 300 l/s

EU

Cavity

EU

Cavity

EU

Cavity

EU

Cavity

BeamDirection

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Bellow


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Special Straights: RF Section (Hybrid Elettra-EU Cavity)

Valve

Bellow&Taper

Taper

EU

Cavity

EU

Cavity

Elletra

Cavity

Elletra

Cavity

SIP 300 l/s SIP 300 l/sSIP 150 l/s

BeamDirection

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32

A Wiggler and Machine Diagnostics in onestraight section

Taper DCCTPD ChamberTaper

BPM feed back Block

FCT

SIP 150L/sSIP 150L/s

W61 (from SLS) for Powder Diffraction beamline (I11).L=1.8 m


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No data is available about ID vacuum chambers of Phase 1 beamlines except Protein Crystallography beam line (ALS Wiggler).

These IDs chamber will be manufactured on separate lot.

Complete design to start upon receiving data from Scientificsection.

Phase 1 Insertion Device Chambers


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Instrumentations

Total and partial pressure measurements:Inverted Magnetron Gauges (IMG) or Bayard-Alpert Type? one per cell/long Straights.

Pirani Gauges or Micro Pirani Gauges ? one per cell/Long Straights.

Pressure Reading at each SIP through High power Distributer HPD

RGA Mobile.Others:

Helium Leak Detector (HLD) Mobile.

Pumping Port (PP)

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Instrumentations

HLD+IMG

RGA+PP+Pirani

PiraniIMG

HLD RGA+PP

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Vacuum Interlock & Measurement

ShieldingWall

PS: Photon Shutter

FV: Fast Valve

FVS: Fast Valve Sensor

GV: gate valve

HPD: High Power Distributer

IG: Ion Gauge37

IG

IG


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Heat Interlocks

Dedicated for machine operation.

Thermocouples for temperature Interlocks.

4 TCs (upper and lower of slot ) near Flat seal and BPM close to Absorbers

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Pressure of a few n mbar to protect the UHV SR vacuumfrom HV beam line with windowor differential pumping.

BMC: Bending Magnet Chamber

ECP: End Cooled Plate

GV:Pneumatic gate valve

1st day Front End

BMC

ECP

GV

ECP

ECP

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THANK YOU

Vacuum TAC2010 Amor

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