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OP day 2008 Problems and worries P ole F ace W indings of the PS. Pierre Freyermuth. Topics. Introduction New PFW supplying Operations mechanism 2007 Objectives Initially start with 3 current mode but… Commissioning Write the adjustment software - PowerPoint PPT Presentation
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OP day 2008
Problems and worries
Pole Face Windings of the PS
Pierre Freyermuth
OP day - Pierre Freyermuth
TopicsI. Introduction
a. New PFW supplyingb. Operations mechanism
II. 2007 Objectives a. Initially start with 3 current mode but…b. Commissioningc. Write the adjustment softwared. Measuring matrix current/parameter
III. 2007 Worriesa. Power converters limitation discoveryb. Qmeter worries
IV. 2007 Performed Worka. Measurements and tests on PFW power convertersb. A first version of the adjustment softwarec. Some point of the matrix are done
V. 2008 Objectivesa. Start-up with calculated matrix from the 3 current modeb. Consolidation of PFW softwarec. Re-validate power converters with new improvements d. Measuring matrix
VI. Acknowledgements
march 18th 2008
OP day - Pierre Freyermuth
I. Introductiona. New PFW supplying : From
3 to 5 currents, new magnetic possibilities.
march 18th 2008
OP day - Pierre Freyermuth
I. Introduction
B8
DNi
PRW8L
PRWDNi
FWi
FWp
DWi
DWp
PRWFW
PRWDW
FNi
PRWFNi
FNp
PRWFNp
DNp
PRWDNp
a. New PFW supplying : new adjustment strategy.
We have the possibility to adjust 5 currents to control 4 parameters.A fifth parameter can be Q’’ or the less RMS current.
march 18th 2008
OP day - Pierre Freyermuth
b. Operation mechanism
I. Introduction
Initialization
Measurements
Adjustments
Validation
Q & Xi Functions
B referenceBasic PFW functionsOffsets (induced currents)
Basics Function + offsets + delay
Matrix Current/Parameters
Delta Q Xi and PFW
GFA Functions
F divided by 2 F divided by 2 D divided by 2 D divided by 2 8L
-69.62583902 -69.62583902 -69.34348382 -69.34348382 -140.9071886
4724.450193 4724.450193 4448.004963 4448.004963 15618.09203
-132097.6443 -132097.6443 -120847.1562 -120847.1562 -629118.599
2008207.907 2008207.907 1878489.268 1878489.268 12876124.13
-18441185.6 -18441185.6 -19064782.56 -19064782.56 -153801695.1
107310799.4 107310799.4 135356468.3 135356468.3 1156879365
-400722679.1 -400722679.1 -692359922.2 -692359922.2 -5752779781
926255245.5 926255245.5 2561901332 2561901332 19484885283
-1085404765 -1085404765 -6778874121 -6778874121 -45310391674
-311012453.2 -311012453.2 12412841053 12412841053 70431719737
3090360677 3090360677 -14337015336 -14337015336 -64975740067
-4010216606 -4010216606 6808948644 6808948644 15077847896
298791600.1 298791600.1 6952676039 6952676039 42452276462
4582049839 4582049839 -13544238105 -13544238105 -50622889472
-3978062740 -3978062740 4922539229 4922539229 4339840389
-2137567755 -2137567755 9776915079 9776915079 43423592268
6834200682 6834200682 -16099815280 -16099815280 -51959530208
-6190441427 -6190441427 11822739710 11822739710 31707962067
2976968966 2976968966 -4965473500 -4965473500 -11427875585
-771198535.1 -771198535.1 1158457836 1158457836 2322745119
85249649.04 85249649.04 -117296409.9 -117296409.9 -207001787.5
PR.P-MC-dQH-dFN 0.00178088 1.89E-07 -1.89E-11
PR.P-MC-dQH-dFW 0.0007982 -1.44E-07 6.89E-12
PR.P-MC-dQH-dDN -0.0046678 2.47E-06 -2.43E-10
PR.P-MC-dQH-dDW -0.00053476 9.65E-08 -4.62E-12
PR.P-MC-dQH-d8L -0.00048114 8.49E-08 -3.91E-12
PR.P-MC-dQV-dFN -0.00043632 7.85E-08 -3.74E-12
PR.P-MC-dQV-dFW -0.00049511 8.94E-08 -4.28E-12
PR.P-MC-dQV-dDN 0.00071702 -1.28E-07 6.08E-12
PR.P-MC-dQV-dDW 0.00084204 -1.52E-07 7.22E-12
PR.P-MC-dQV-d8L 0.00049109 -8.67E-08 4.00E-12
PR.P-MC-dXiH-dFN 0.05708207 6.15E-06 -6.15E-10
PR.P-MC-dXiH-dFW -0.01415477 -9.70E-07 9.69E-11
PR.P-MC-dXiH-dDN 0.03163256 3.58E-06 -3.58E-10
PR.P-MC-dXiH-dDW -0.00707463 -5.11E-07 5.10E-11
PR.P-MC-dXiH-d8L 0.00217581 -2.53E-07 2.53E-11
PR.P-MC-dXiV-dFN -0.03549138 -4.60E-06 4.59E-10
PR.P-MC-dXiV-dFW 0.01003489 1.33E-06 -1.33E-10
PR.P-MC-dXiV-dDN -0.0482633 -4.69E-06 4.69E-10
PR.P-MC-dXiV-dDW 0.01036297 4.94E-07 -4.93E-11
PR.P-MC-dXiV-d8L -0.00029342 -4.96E-08 4.95E-12
march 18th 2008
OP day - Pierre Freyermuth
b. Operation mechanism
The Matrix is:
Polynomials define the behavior of Qh, Qv, h, v as a function of current in DN, DW, FN, FW, 8L.
Fesa Class is used to store it.
I. IntroductionPR.P-MC-dQH-dFN 0.00178088 1.89E-07 -1.89E-11
PR.P-MC-dQH-dFW 0.0007982 -1.44E-07 6.89E-12
PR.P-MC-dQH-dDN -0.0046678 2.47E-06 -2.43E-10
PR.P-MC-dQH-dDW -0.00053476 9.65E-08 -4.62E-12
PR.P-MC-dQH-d8L -0.00048114 8.49E-08 -3.91E-12
PR.P-MC-dQV-dFN -0.00043632 7.85E-08 -3.74E-12
PR.P-MC-dQV-dFW -0.00049511 8.94E-08 -4.28E-12
PR.P-MC-dQV-dDN 0.00071702 -1.28E-07 6.08E-12
PR.P-MC-dQV-dDW 0.00084204 -1.52E-07 7.22E-12
PR.P-MC-dQV-d8L 0.00049109 -8.67E-08 4.00E-12
PR.P-MC-dXiH-dFN 0.05708207 6.15E-06 -6.15E-10
PR.P-MC-dXiH-dFW -0.01415477 -9.70E-07 9.69E-11
PR.P-MC-dXiH-dDN 0.03163256 3.58E-06 -3.58E-10
PR.P-MC-dXiH-dDW -0.00707463 -5.11E-07 5.10E-11
PR.P-MC-dXiH-d8L 0.00217581 -2.53E-07 2.53E-11
PR.P-MC-dXiV-dFN -0.03549138 -4.60E-06 4.59E-10
PR.P-MC-dXiV-dFW 0.01003489 1.33E-06 -1.33E-10
PR.P-MC-dXiV-dDN -0.0482633 -4.69E-06 4.69E-10
PR.P-MC-dXiV-dDW 0.01036297 4.94E-07 -4.93E-11
PR.P-MC-dXiV-d8L -0.00029342 -4.96E-08 4.95E-12
march 18th 2008
OP day - Pierre Freyermuth
a. Initially start with 3 current mode but…After the Cold check-out measurements, it was
decide to keep the 5 currents mode.
b. CommissioningTest, measure and validate to the 2008 start-up
c. Write the adjustment softwareA software to be able to control tune and
chromaticity. Imply to determine different new scenarios and re-write the previous application.
d. Measuring matrix current/parameterUse a special cycle for measurements, a multi flat-
top one or separated cycles.
II. 2007 Objectives
march 18th 2008
OP day - Pierre Freyermuth
a. Power converters limitations discovery:The 2007 run history.
III. Worries
April Mai June July August
5 5 5
Sta
rt-u
p
Sh
ut
Dow
n
3 3
Many changes between 3 to the new 5 currents mode occurred.
march 18th 2008
OP day - Pierre Freyermuth
a. Power converters limitation discovery:
III. Worries
April Mai June July August
55 53 3
At the beginning, induced currents from B field was not well compensate.
New samplers available, but with data worries.
We observed problems with the East Spills.
Adjustment of balance resistors between pair and odd windings.
Power converters started to be unstable.
We decided to return back in 3 currents mode the 15th of may.
march 18th 2008
OP day - Pierre Freyermuth
a. Power converters limitation discovery:
III. Worries
April Mai June July August
55 53 3
march 18th 2008
OP day - Pierre Freyermuth
a. Power converters limitation discovery:
III. Worries
April Mai June July August5
553 3
Back to 5CM, but still with induce currents.
Worries with GFA.
Many works done to improve the Dirac spill, not really successful.
Hybrid test, with new converters except the 8 loop.
The Multi-Turn Extraction was nearly impossible, whereas good in 3CM.
Back to 3CM to measure tune and East spill, in order to underline the difference of beam quality.
march 18th 2008
OP day - Pierre Freyermuth
a. Power converters limitation discovery:
III. Worries
April Mai June July August5
553 3
Dirac Spill 5CMDirac Spill 3CM
march 18th 2008
OP day - Pierre Freyermuth
a. Power converters limitation discovery:
III. Worries
April Mai June July August5 5 53 3
Back to 5CM, after lot of works from PO team. Among others, the synchronization of acquisitions and regulation loop was improve.
Dirac experiment observed a better spill than the 3CM.
MTE islands in 5CM.
But still a “transition” error around 40A.
march 18th 2008
OP day - Pierre Freyermuth
a. Power converters limitation discovery:
III. Worries
April Mai June July August5 5 53 3
3CM 5CMDirac Spill after averaging.
march 18th 2008
OP day - Pierre Freyermuth
a. Power converters limitation discovery:
III. Worries
April Mai June July August5 5 53 3
40A instabilities during 2007 run. Nowadays PO team found the solution.
march 18th 2008
OP day - Pierre Freyermuth
b. Q meter The BBQ front-end installed and connected to the
old acquisition system.
Measurements was impossible with an excursion more than 10mm.
III. Worries
march 18th 2008
OP day - Pierre Freyermuth
b. Q meter The most important impacts were
The impossibility to measure non-linear chromaticity.
Lot of points of the matrix is missing.
Q meter is an important tool for operation.
III. Worries
march 18th 2008
OP day - Pierre Freyermuth
a. Measurements and tests on PFW power converters Lots of tests were made, with impacts on the physic run. PO team brought PFW power converters to our
requirements.
b. A first version of the adjustment software Initialization, adjustments, measurements and validation
system work. Some adjusment scenarios was found.
c. Some point of the matrix are done 14 GeV/c 3,5 GeV/c 26 GeV/c (From 2004 measurement).
d. BBQ measurement was improved until the end of the run
IV. 2007 Performed Works
march 18th 2008
OP day - Pierre Freyermuth
a. Start-up with a calculated matrix and the virtual 3 current mode.
b. Consolidation of PFW software.
c. Re-validate power converters with new improvements.
A new DSP to avoid 40A ripple and reduce delays.
d. Validate tune measurementsBBQ and old system
e. Measuring matrix.
V. 2008 Objectives
march 18th 2008
OP day - Pierre Freyermuth
Bernard Vandorpe Simone Gilardoni Rende Steerenberg Jean-Paul Burnet, Olivier Michels And The PO team Marek Gasior and the BI team
All people imply in this project
VI. Acknowledgements
march 18th 2008
OP day 2008
Problems and worries
Pole Face Windings of the PS
Pierre Freyermuth
\\cern.ch\dfs\Users\p\pfreyerm\Public\Problems and worries PS.pptx
