Power Converter at DESY
J-P Jensen DESY Hamburg
CAS Power Converter
Warrington May 2004
1
DESY Site
CAS Power Converter
Warrington May 2004
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DESY Accelerators and Storage Rings
CAS Power Converter
Warrington May 2004
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DESY Staff
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Staff members: 1300
Scientist: 2000 – 2500 a year
M-Division: 500
MKK-Group: 100
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Machine Power Cooling (Maschine Kraft Kühlung)
Power Converter Magnet: 30
Power Converter RF: 8
2 personnel on shift and 3 on call
CAS Power Converter
Warrington May 2004
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4000 A and 550 V Units
•parallel and serious
connection
•outdoor oil
transformer
•cables and water
pipes from the
ceiling
CAS Power Converter
Warrington May 2004
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Thyristor Power Converter
Current
Voltage
Units
Circuit
500 A to 12.000 A
100 V to 3600 V
150
B6, B12 and B24,
passive and active filter
Power part built by industry,
DESY specification
CAS Power Converter
Warrington May 2004
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HERA Power Converter
•water cooling for transformer,
choke , SCRs and diodes
•no fan
•standard interface to electronic
•cables and water pipes from
the ceiling
•separate cabinet for electronic
rack
CAS Power Converter
Warrington May 2004
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HERA Chopper Power Converter
•Diode rectifier for 16 to
32 choppers
•Horizontal arrangement
•chopper rack
•DCCT core and pole
reversal rack
•Electronic rack for
regulation, DCCT electronic
and PSC
CAS Power Converter
Warrington May 2004
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Chopper and Interlock
CAS Power Converter
Warrington May 2004
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HERA Correction Power Converter
• 3,5 A and 110 V
• Primary switched buck
converter
• Pole reversal
• Two current shunts
• Designed in 1986,
600 units
• Excellent reliability
•Current precision < 10-4
CAS Power Converter
Warrington May 2004
10
PETRA III
Shut down HERA:
July 2007
Construction
PETRA 3:
July 2007 –
October 2008
Start User
Facility:
Spring 2009
New experimental
Hall
CAS Power Converter
Warrington May 2004
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PETRA Tunnel
PETRA II has aluminum bus
bars for 1500 A
For the 7/8 ring this bus
bar system will be taken
again for cost reasons.
The experimental hall has
to be bypasses by cables.
New cabling for the
magnets in the
experimental area,
1/8 of the ring
CAS Power Converter
Warrington May 2004
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Power Converter
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Main magnets
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Accuracy
∆I/IN = 1*10-4 (long term stability)
Resolution
16 bit
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Steerers
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Accuracy
∆I/IN = 5*10-4 (long term stability)
Resolution
14 bit
CAS Power Converter
Warrington May 2004
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List of Power Converter
Typ
Voltage
Current
Power
Quantity
Prerectifier
130V
2300A
300KW
9
Prerectifier
30V
2300A
70KW
3
SCR-Supply
750V
600A
450KW
3
SCR-Supply
350V
600A
180KW
6
Chopper
100V
600A
48KW
30
Chopper
35V
200A
7KW
100
Chopper
20V
600A
12KW
22
Steerer
35V
15A
0,5KW
360
CAS Power Converter
Warrington May 2004
14
RF Power Supply
DESY II
50 kV, 18 A 2 units
PETRA, DORIS 65 kV, 36 A 5 units
HERA
80 kV, 40 A 6 units
Feedback
50 kV, 12 A 2 units
10 kV
Filter
LTTCrowbar
500 MHz
Klystron
Power Converter
CAS Power Converter
Warrington May 2004
15
Test Results of LTT-Crowbar
kA
7
Crowbar
6
5
4
3
2
Klystron
1
0
0.0
2.5
5.0
7.5
10.0
12.5
15.0
17.5
20.0
22.5
25.0
µs
Crowbar operation under load short circuit conditions
(Parameter Udc = 10 / 20 / 30 / 40 / 50 / 60 / 70 / 76 kV)
CAS Power Converter
Warrington May 2004
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XFEL Project
CAS Power Converter
Warrington May 2004
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XFEL Project
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European project
Total costs 670 Mio €
Germany gives 50 %
Response from the community is good
CAS Power Converter
Warrington May 2004
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Tunnel Design
80 cm
125 cm
50 cm
520 cm
190 cm
90 cm
30 cm
210 cm
440 cm
Figure 2. Main LINAC, Damping Ring & Electronic Station
CAS Power Converter
Warrington May 2004
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XFEL Schedule
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Planning approval procedure
2005
Start of civil engineering and tunnel
construction
2006
Installation in tunnel, beam lines and
buildings
2007 -2011
Commissioning
2012
Start XFEL operation
2013
CAS Power Converter
Warrington May 2004
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