e.huttel, vacuum workshop, alba, 12-13 sept.05 forschungszentrum karlsruhe / anka the anka vacuum...
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E.Huttel, Vacuum Workshop, ALBA, 12-13 Sept.05
Forschungszentrum Karlsruhe / ANKA
The ANKA Vacuum System
S.Hermle A.VölkerE.Huttel T.Fischböck
E.Huttel, Vacuum Workshop, ALBA, 12-13 Sept.05
Forschungszentrum Karlsruhe / ANKA
ANKA Parameter
Energy 0.5 – 2.5 GeV
Emittance 50 nm
Circumference 110.4 m
Current 0.2 (0.4) A
Loss per Turn 0.6 MeV
Energy Accept. 0.015
Bbend 0.3 – 1.5 T
Damping 3, 3, 1.5 ms
In operation:3 Beam lines for Micro fabrication9 Analytical Beam linesIn planning: 3
E.Huttel, Vacuum Workshop, ALBA, 12-13 Sept.05
Forschungszentrum Karlsruhe / ANKA
One of the Row
BESSY ANKA SLS CLS ASP
First Beam April 1998 Jan 2000 Dec. 2000 Dec. 2003 (2006)
Material LN316 LN316 LN316 LN316 LN316
Absorber Lumped + Distributed
Lumped + Distributed
Lumped Lumped Lumped
Pumps Triode Diode (Ti) Diode (Ti) Diode (Ti+Ta)
Diode (Ti)
Baking In-situ Pre bake ‘In–situ’ ‘In–situ’ ‘In–situ’
Flanges CF CF VAT Seal VAT Seal VAT Seal
Manufacturer PINK, FMB FMB FMB FMB FMB
Ingmar Lehmann, FMBLothar Schulz, SLSErhard Huttel, ANKA
E.Huttel, Vacuum Workshop, ALBA, 12-13 Sept.05
Forschungszentrum Karlsruhe / ANKA
Vacuum Chamber Lay Out
E.Huttel, Vacuum Workshop, ALBA, 12-13 Sept.05
Forschungszentrum Karlsruhe / ANKA
Lay out, Continued
Following chamber: e-beam chamber onlyDistributed AbsorberSmall pumps (150 l/s) every 1.5 m
Large Chamber (Dipole plus following Quad /Sextupole )e-beam Chamber plus Ante ChamberEach ante chamber:
Lumped absorber (Covering 80% of SR)Large (500/300 l/s) pumps
E.Huttel, Vacuum Workshop, ALBA, 12-13 Sept.05
Forschungszentrum Karlsruhe / ANKA
Pumping
Standard Diode Ion pumps Varian16 x 500 l/s16 x 300 l/s63 x 150 l/s
30 Controller300 l/s + 500 l/s connected to 1 Contr.Up to 8 150 l/s connected to 1 Contr.Each pump current measured
E.Huttel, Vacuum Workshop, ALBA, 12-13 Sept.05
Forschungszentrum Karlsruhe / ANKA
Vacuum Preparations and Assembling
Specification: Leak rate < 10-10 mbar l/sDesorption rate: < 10-12 mbar l/ (s cm2)Masses>40 < 0.01
No Firing
Baking and test at factory
Baking and assembling on side(Pumps, gauges, absorber)
Venting with N2
Assembling in storage ring
Pumping
E.Huttel, Vacuum Workshop, ALBA, 12-13 Sept.05
Forschungszentrum Karlsruhe / ANKA
Production
E.Huttel, Vacuum Workshop, ALBA, 12-13 Sept.05
Forschungszentrum Karlsruhe / ANKA
Expected Vacuum Behavior
0.0E+00
5.0E-09
1.0E-08
1.5E-08
2.0E-08
2.5E-08
0 1 2 3 4 5 6 7 8 9 10 11 12 13
length [m]
pre
ssure
[m
bar]
1.E-06
1.E-05
1.E-04
1.E-03
1.E-02
1.E+21 1.E+22 1.E+23 1.E+24
Dose [ph]
eta
[mo
l /p
h ]
Distributed AbsorberC.Herbeaux et al. Vac60(2001)113
Lumped AbsorberV.V.Anashin et al. EPAC(1998)2163
1.E-6
1.E-5
1.E-4
1.E-3
1.E-2
1.E-1
1.E+20 1.E+21 1.E+22 1.E+23 1.E+24 1.E+25
Dose per length [Ph / m]
Eta
[m
ol /
ph
]10 Ah
100 Ah
Exposed: 0.035 m Factor 10 difference for dose per length
E.Huttel, Vacuum Workshop, ALBA, 12-13 Sept.05
Forschungszentrum Karlsruhe / ANKA
1.E-3
1.E-2
1.E-1
1.E+0
1.E+1
1.E-2 1.E-1 1.E+0 1.E+1 1.E+2 1.E+3
dose at 2.5 GeV [Ah]
Cu
rren
t *
lifet
ime
[Ah
]
1.E-8
1.E-7
1.E-6
1.E-5
pre
ssu
re /
curr
ent
[mb
ar/A
]
What We Get (Logarithmic Scale) !
0
0.5
1
1.5
2
2.5
0 0.5 1 1.5 2 2.5
E [GeV]
p [
10-9
mb
ar]
0
0.5
1
1.5
2
2.5
0 0.5 1 1.5 2 2.5
E [GeV]
p [
10-9
mb
ar]
Prediction PAC98
Linear in Energy and Current
SLS
Saturation due to Touscheck
E.Huttel, Vacuum Workshop, ALBA, 12-13 Sept.05
Forschungszentrum Karlsruhe / ANKA
What Happened (Linear scale) !
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
40.0
0 200 400 600 800 1000 1200 1400 1600 1800
Dose [Ah]
Lif
eti
me@
100 m
A [
h]
Kr Accident
SUL Wiggler
Wera Undulator + Broken Window
SCU14
50 Ah to recover, when ¼ of storage ring vented N2
100 Ah, when vented with air
With more Valves now,10 Ah to recover when
venting straight section only
E.Huttel, Vacuum Workshop, ALBA, 12-13 Sept.05
Forschungszentrum Karlsruhe / ANKA
Major Accident I (Kr Lamp 2002)
(Standard diodes do not pump noble gases)Pumped Storage Ring with Turbo PumpsWhile baking all PumpsRecovered!!
Not my design!!They did not tell us!Look for the BL design!!
Syn.Rad.
Kr lamp for bakingbehind Be – Mirror (Exposed to SR)
Broke
Conclusion: Standard Diodes or ok
E.Huttel, Vacuum Workshop, ALBA, 12-13 Sept.05
Forschungszentrum Karlsruhe / ANKA
Major Accident II 2003 (Broken FE Window)
Exposed SR to air H2O !, Not dry N2 !
Cleaning with Syn.Rad. took 100 Ah to recover!
Syn.Rad.
Pyrex window in Diagnostic Front EndReplaced after 3 Year of Use
(became brown)New one broke after 6 month
E.Huttel, Vacuum Workshop, ALBA, 12-13 Sept.05
Forschungszentrum Karlsruhe / ANKA
Instrumentation (Storage Ring)
1.E-10
1.E-09
1.E-08
8:00 10:00 12:00 14:00 16:00 18:00 20:00 22:00 0:00 2:00 4:00 6:00 8:00p
[m
bar]
No Pirani, I do not miss them !12 Penning Gauges
4 QMS
1.E-10
1.E-09
1.E-08
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
p [
mb
ar]
95 Ion Pump Current Monitors
E.Huttel, Vacuum Workshop, ALBA, 12-13 Sept.05
Forschungszentrum Karlsruhe / ANKA
Manufacturer
Product Typ No. Manuf. Cost €
Chamber 316 LN 110.4 m FMB 0.6 Mill ok
Ion Pumps
Controller
150 – 500 l/s
Midivac
63/16/16
30
Varian 0.4 Mill ok
now ok
Roughing Turbo
150 l/s 6 Varian 0.05 Mill ok
Gauges -
Sector Valves
Roughing
100 CF
63 CF
6
16
Cetec 0.02 Mill ok (Schedule-)
Gauges, QMS
Leak Det.
IKR70, PG300,
QMS422
8 Pfeiffer 0.02 Mill ok
E.Huttel, Vacuum Workshop, ALBA, 12-13 Sept.05
Forschungszentrum Karlsruhe / ANKA
Conclusion
Effect Gain
Firing Reduces H2 ?
Pre bake Removes H2O Needed
‘In situ’ bake out Removes H2O better 20 Ah
Material:
Desorption
Conductivity
Cost
=> better
.η (Al) > η (SS) ~ η (Cu)
.λ (SS) < λ (Al) ~ λ (Cu)
Cost (Cu) > Cost (Al) > Cost (SS)
Steel best cost performance?
unless you go to NEG coating
Ti Sublimator Additional pumping speed ?
Standard Diodes Pumping speed 50 % higher Yes
NEG coating Removes H2 CO 200 Ah
Only Lumped absorber
Better conductance source to sink
25-50 % better
pressure