CSCM Type TestPowering & Cryogenic aspects
H. Thiesen
TE-MPE-TM – 13 June 2013
B. Auchmann, K. Brodzinski, Z. Charifoulline, G. D’Angelo,K. Fuchsberger, A. Gorzawski, H. Pfeffer, I. Romera-Ramirez,V. Roger, S. Rowan, J. Steckert, H. Thiesen, A. Verweij, G. Willering,D. Wollmann, Cryo Operator.
CSCM Type Test T
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• The CSCM type test have been realized in sector 23 beginning of April (from 08/04 to 23/04)
• 6 power cycles (1, 2, 4, 6, 6 and 8 kA) have been realized with the RQF circuit and 8 (2, 4, 6, 7, 8, 6, 9 and 6 kA) with the RB circuit.
RB.A23 (6 kA - 50 s)RQF.A23 (4 kA - 24 s)
Objectives of CSCM the Type Test T
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• The objectives of the CSCM type test were:• For the powering system (18 kV, PC, EE and PIC)
• Validate the hardware and software modifications• Validate the special operating conditions (magnet at 20 K)• Validate the circuit models (discharge time in case of FastPA)• Control the current in the circuit specially during the diode transitions
• For the cryogenic systems (DFBAs and Magnets)• Validate the special operation conditions
• DFBAs operation at nominal condition (liquid He at 4.5 K – 1 bar)• Magnets at 20 K and 5 bar.
• Validate the temperature stability in the magnets before the power cycles• Study the DT and DP during and after the power cycles• Study the recovery after the power cycles
Powering modificationsT
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• The powering circuits have been modified for the CSCM type test (EMDS#1278061)
• The 2 thyristor bridges have been connected in series (normally in parallel)• The energy extraction switches have been short-circuited• The earth have been connected at the output of the RB power converter
(normally at the middle point of the EE system)• RB power converter has been used to power the RQF circuit
2x240mm22x240mm2
18 kV power distribution networkT
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2013
• The setting of the 18 kV MCB has been modified (EDMS#1275760)• Normal operating conditions of the RB power converter: 3MVA• CSCM operating conditions of the RB power converter: 6MVA• No hardware/software modification.
Pb with existing parameters
2 steps (125A and 135A)
Tested at 9 kA
ElQAT
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• Before and after the CSCM type test, the 3 main circuits (RB, RQF and RQD) have been tested with success.
• The conditions were:• BFBAs were at nominal conditions: Liquid helium at 4.5 K and 1 bar• Magnets were at 20 K and 4.5 bar• 600 V for the RB circuit and 400 V for the RQ circuits (do we need 600 V for
RQ circuits?)
• The results were:
ElQAT
E-M
PE
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SC
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test
- 1
3 Ju
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2013
• Before and after the CSCM type test, the 3 main circuits (RB, RQF and RQD) have been tested with success.
• The conditions were:• BFBAs were at nominal conditions: Liquid helium at 4.5 K and 1 bar• Magnets were at 20 K and 4.5 bar• 600 V for the RB circuit and 400 V for the RQ circuits (do we need 600 V for
RQ circuits?)
• The results were:
Qualification before CSCM test Date: 08/04/2013
Operator Giorgio D'Angelo
Magnet temperature 20 K Pressure in the cold masses 4.5 bar
DFBA temperature 4 K Pressure in the cold masses 2 bar
Test Voltage [V] Duration [s]
Leakage current [A]
Resistance to GND
RQD.A23 400 180 983.0E-9 406.9E+6 RQF.A23 400 180 1.2E-6 325.2E+6 RB.A23.Lead#5 600 180 13.3E-6 45.1E+6 RB.A23.Lead#6 600 180 12.8E-6 46.8E+6
Qualification after CSCM test Date: 23.04.2013 Operator Stephen & Grzegorz
Magnet temperature 20 K Pressure in the cold masses 4.5 bar
DFBA temperature 4 K Pressure in the cold masses 2 bar
Test Voltage [V] Duration [s]
Leakage current [A]
Resistance to GND
RQD.A23 400 180 1.2E-6 341.9E+6 RQF.A23 400 180 1.2E-6 327.9E+6 RB.A23.Lead#5 600 180 13.5E-6 44.5E+6 RB.A23.Lead#6 600 180 16.6E-6 36.1E+6
Power converter settingT
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• One of the main challenges for the power converter was the management of the diode transitions:
• Maximum voltage of the converter was limited at 400 V and the threshold of the diode at 20 K is about 2.8 V
2.8 V
320 VCSCM mathematic:154 * 2.8 V = 431 V = 320 V
Power converter settingT
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• One of the main challenges for the power converter was the management of the diode transitions:
• If the diode transitions are too fast the control of the current is lost
1000 A
55 kA/s
Power converter settingT
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• Solution has been found by reducing the standby current (< I_transition) and adding an intermediate current plateau before the CSCM cycle.
2.8 V
I_outV_out
magnetsdiodestransition
Intermediateplateau at 200 A
Powering performance T
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RQF.A23, 4 KA
Ierr (mA)
3.2 A
Iref, Iout
didt
= 3
00 A
/s
tau = 18 s
Maximum currenterror < 5A
Powering performance T
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RB.A23, 6 KA
Ierr (mA)
3.2 A
didt
= 4
83 A
/s
tau = 90 s
Maximum currenterror < 5A
Iref, Iout
Discharge timeT
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230 ms
Iout
RQF.A23, 8 KA
• The time to ramp down the current at 8 kA is < 0.25 s for the RQ circuit
• Do we need EE system?
Powering performance T
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Vout RB.A23, 9 KA
80 ms
Iout• The time to ramp down the current at 8 kA is < 0.1 s for the RB circuit
• Do we need EE system?
18
Third
Spl
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Revi
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2 –
14 N
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012
Half bridge +
Half bridge -
FWT
• Three separated circuits to cool each SCR bridge• Power dissipated in the bridge is mainly linear with the current• Estimate temperature of semiconductor at 6.5 kA is about 70oC and
maximum operating temperature for the thyrsitor is 125oC
The thermal characteristics of the water plates have to be
identified and validated before to run at 12 kA.
T_water_in = 28 oCFlow_water = 10 l/mn
I_bridge (kA) 6.5 10 11 12P_SCR (kW) 2.48 4.34 4.94 5.56Tj_max (oC)(1) 69 100 109 117Tj_max (oC)(2) 76 112 124 133Rhw = 5 oC/kW(1) or 8 oC/kW(2)
Validation of the power converter at 12 kA and tau = 90 s
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Validation of the power converter at 12 kA and tau = 90 s
Half bridge +
Half bridge -
FWT
4 pipes of 10 mm
5 pipes of 10 mm
2 mm hole
6 mm
CSCM Type Test – Cryogenic aspect L
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20 K
DFBAs at 4.5 K and arc at 20 KExcellent temperature homogeneity: 20 K ± 2 KQ7 temperature: > 17 K
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CSCM Type Test – Cryogenic aspect
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ARC23_MAGS_TTAVG.POSST
ARC23_MAGS_TTMAX.POSST
ARC23_MAGS_TTMIN.POSST
SEC23_AR23_PTAVG.POSST
1 bar
4.5 K
Test of RB at 6 kA / 140 MJ(Emax # 300 MJ)
10 hours
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CSCM Type Test – Cryogenic aspect
TE-CRG-OA_K.Brodzinski, 13.06.2013
Summary of operation:• DFBAs at 4.5 K at normal operation condition, • cold mass operation at ~20 K and 5 bar
Main conclusions:1. Good learning period with refrigeration stabilized, associated settings tested for above
requirements, 2. Stabilization of temperature over a sector could be provided with tolerance of +/- 2 K up
to 4 kA of current cycles. Thermal effect from current 4 - 6 kA starts to introduce stronger thermal effect driving to bigger discrepancy for thermal homogeneity over a sector +/- 4 K.
3. Recovery after the current cycling varies between ~3-5 hours depending on introduced current heat
Propagation of the test on other sectors:• The same cryogenic conditions can be provided for all LHC sectors,• The test planning should be proposed by LHC coordination (details of possible time
window are to be discussed to adapt them with cryogenic installations availability)
Thanks to all persons involved for collaboration !
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CSCM test campaign at the end of LS1T
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• Simulation conditions for the CSCM campaign at the end of LS1:• CSCM campaign will be done in parallel with the survey campaign
• Survey: 07H00 – 15H00• CSCM: 15H00 – 23H00
• Planning by sector• 2 weeks for the preparation• 2 weeks for the tests of the 3 main circuits• 2 weeks for the recovery
• Tests during the week (5 days)
• Results:• No impact• First test in May 2014• Last test in September 2014
CSCM test campaign at the end of LS1T
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PE
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SC
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3 Ju
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2013
• Simulation condition for the CSCM campaign at the end of LS1:• CSCM campaign in parallel with the survey
• Survey: 07H00 – 15H00• CSCM: 15H00 – 23H00
• Planning by sector• 2 weeks for the preparation• 2 weeks for the tests of the 3 main circuits• 2 weeks for the recovery
• Tests during the week (5 days)
• Results:• No impact• First test in May 2014• Last test in September 2014
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22
LS1 schedule in the LHC machine
2015
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
MAY
19
20
21
NOV46
47
48
49
DEC50
51
52
1
JAN
FEB
OCT
41
42
43
44
2014
2
3
4
5
6
7
8
9
10
11
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13
14
15
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19
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21
OCT
49
DEC50
51
52
1
JAN
JUNE24
25
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27
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31
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35
7
FEB
2013
8
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11
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13
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18
MAY
19
20
22
23
24
25
26
27
28
29
30
LSS
45
31
32
33
34
35
LSS Arc 81 LSSR2E R2E R2E
Pt 7LSS Arc 78 LSS
Pt 8LSSArc 56 LSS Pt 6Arc 23 LSS Pt 3 Arc 34 LSS
Pt 1LSS Arc 12 LSS Pt 2 LSS
R2ELSS Arc 67 LSSPt 4 LSS Arc 45 LSS
Pt 5
2013
FEB
7
MAR11
17
18
APR
14
19
8
20
21
22
JUNE
23
9
MAR
10
APR15
16
12
13
MAY
28
29
24
25
26
30
31
JULY
27
21
22
23
32
33
34
35
SEPT
36
40
AUG
OCT
41
42
43
32
36
37
38
39
SEPT37
38
39
44
40
41
42
43
44
NOV
45
46
47
48
NOV
48
50
51
45
46
47
52
1
DEC
49
2014
JAN
MAR
10
14
FEB
6
APR
MAY
22
2
3
JUNE
31
AUG
JULY
SEPT
41
42
43
44
NOV
45
OCT
FEB7
8
4
5
9
APR
15
16
17
MAR11
12
13
18
JUNE24
25
MAY
19
20
21
26
27
23
JULY
28
29
30
AUG
40
32
33
34
35
36
37
38
39
36
SEPT37
38
39
40
50
51
46
47
48
52
1
DEC
49
2015
JAN
MAR
10
14
FEB
6
APR
MAY
22
2
3
7
8
4
19
20
21
5
9
APR
15
16
17
MAR11
12
13
18
CSCM
CSCM
CSCM
CSCM
Powering tests
ELQA
Warm-upLeak tests
ELQA
Leak tests
Preparation
ELQA
Flushing
ELQA
Cool-down
ELQA
Powering tests
Powering testsELQA
Warm-up
Leak tests
ELQALeak tests
Preparation
ELQA
Flushing
ELQACool-down
ELQA
Powering tests
Powering tests
ELQA
Warm-upLeak tests
ELQALeak tests
Preparation
ELQA
Flushing
ELQACool-down
ELQA
Powering tests
Powering testsELQA
Warm-upLeak tests
ELQA
Leak tests
Preparation
ELQA
Flushing
ELQACool-down
ELQA
Powering tests
Powering testsELQA
Warm-upLeak tests
ELQALeak tests
Preparation
ELQA
Flushing
ELQA
Cool-down
ELQA
Powering tests
Powering tests
ELQA
Warm-upLeak tests
ELQA
Leak tests
Preparation
ELQA
Flushing
ELQA
Cool-down
ELQA
Powering tests
Powering tests
ELQA
Warm-upLeak tests
ELQA
Leak tests
Preparation
ELQA
Flushing
ELQA
Cool-down
ELQA
Powering tests
Powering tests
ELQA
Warm-up
ELQALeak tests
Preparation
ELQA
Flushing
ELQACool-down
ELQA
Powering tests
Leak testsCSCM
lockoutlockout
lockout
lockout lockoutlockout lockout
lockout
Machine checkout
Physics
Test DSO
IC total
IC total
IC total
IC total
IC total
IC total
IC total
DFB
AJ
DFB
AK
DFB
AL
DFB
AM
DFB
AN
DFB
AO
DFB
AP
DFB
AA
DFB
AB
DFB
AC
DFB
AD
DFB
AE
DFB
AF
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AG
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DYPB
DYPB
DYPB
DYPB
DYPB
DYPB
DYPB
DYPB
DYPB
DYPB
DYPB
DYPB
DYPB
DYPB
DYPB
DYPB
EPC 60A
EPC 60A
EPC 60A
EPC 60A
EPC 60A
EPC 60A
EPC 60A
EPC 60A
EPC 60A
EPC 60A
EPC 60A
EPC 60A
EPC 60A
EP
EP
EP
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EP
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Surv
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Surv
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ey
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Cabl
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Cabl
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Cabl
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Cabl
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ing
Cabl
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Cabl
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Cabling
Cabling
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Cabl
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Cabling
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Cabl
ing
Cabling
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Cabl
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Cabling
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ing
Cabl
ing
Cabl
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Cabl
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Cabl
ing
Cabl
ing
Cabl
ing
Cabl
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WCC
WCC
WCC
WCC
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SC te
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SC te
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SC te
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Electrical Maintenance - No accessElectrical Maintenance - No access
Electrical Maintenance - No access
Electrical Maintenance - No access
Electrical Maintenance - No access
Electrical Maintenance - No access
Electrical Maintenance - No access
Electrical Maintenance - No access
Electrical Maintenance - No access
Acc.
PAD_MADPAD_MAD
PAD_MAD
PAD_MAD PAD_MADPAD_MAD PAD_MAD
PAD_MAD
PAD_MAD PAD_MAD
PAD_MAD
PAD_MADPAD_MAD
PAD_MADPAD_MAD
PAD_MAD
PAD_MAD
PAD_MAD PAD_MAD
Acc.
PAD_MAD
PAD_MAD
PAD_MAD
PAD_MAD
PAD_MAD
PAD_MAD
PAD_MAD
theLargeHadronColliderproject
LHC Project Document No.
LHC-PM-MS-0016 V.3.0 -simulation CSCM
CERN Div./Group or Supplier/Contractor Document
EN-MEF-OSSEDMS Document No.
SIMULATION CSCM
Prepared by Checked by Approved by
M. BarberanM. BernardiniJ. CoupardK. Foraz
Klys
tron
sSi
licon
oil r
econ
ditio
nnin
g
MKD
-MKB
gen
erat
ors
MD
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test
s
MD
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test
s
Christmas
MKD
-En
try
boxe
s
MKD
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try
boxe
s
R2E-Test Fire Detection
LHCF
LHCF
UW
SF M
.
UW
SF
M.
UW
SF
M.
UW
SF
M.
Beam commissioning
UPS
Sector Test
CSCM
CSCM
CSCM
CSCM
CSCM test campaign at the end of LS1T
E-M
PE
-TM
– C
SC
M t
ype
test
- 1
3 Ju
ne
2013
• 2 teams per CSCM activity• Could we do CSCM test in parallel
with HWC ? • No other activities for the CSCM
team during the powering tests