Update RB HWC with the new GUI
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%% Cell type:markdown id: tags: | ||
<h1><center>Analysis of a PNO.D16 HWC Test in an IT Circuit</center></h1> | ||
The main quadrupole magnet circuits of the 8 Inner Triplet (IT) systems in the LHC are composed of four single aperture quadrupole magnets in series and have a particular powering configuration, consisting of three nested power converters (PC), see Figure below. | ||
<img src="https://gitlab.cern.ch/LHCData/lhc-sm-hwc/-/raw/master/figures/it/IT.png" width=75%> | ||
Main quadrupole magnet circuit of the Inner Triplet system for IT’s at points 1 and 5 (left) and IT’s at points 2 and 8 (right). | ||
Note that the configuration for the IT’s in points 1 and 5 is different from the configuration in points 2 and 8. An earth detection system is present at the minus of the RTQX2 converter. Detailed information concerning the converters is given in EDMS 1054483. Note that the currents in the quadrupole magnets are given by: | ||
\begin{equation} | ||
I_\text{Q1} = I_\text{RQX} + I_\text{RTQX1} \\ | ||
I_\text{Q2} = I_\text{RQX} + I_\text{RTQX2} \\ | ||
I_\text{Q3} = I_\text{RQX} \\ | ||
\end{equation} | ||
The two magnets Q1 and Q3 are type MQXA and the two combined magnets Q2a and Q2b are type MQXB. Q1 is located towards the interaction point. | ||
Note that the IT’s at points 2 and 8 have a slightly higher nominal operating current than the IT’s at points 1 and 5, see Table 1. | ||
|Circuit|I\_PNO RQX|I\_PNO RTQX2|I\_PNO RTQX1| | ||
|-------|----------|------------|------------| | ||
|RQX.L2, RQX.R2, RQX.L8, RQX.R8|7180 A| 4780 A|550 A| | ||
|RQX.L1, RQX.R1, RQX.L5, RQX.R5|6800 A| 4600 A|550 A| | ||
### PNO.D16: PC Failure at 90% of I_PNO | ||
The aim of this test is to calculate the splice resistances, check the regulation of the current leads, and verify the correct functionality of the PC when a powering failure is generated. The currents are equal to 90% of the nominal current in the RQX, RTQX1, and RTQX2 converters, see figures below. | ||
<img src="https://gitlab.cern.ch/LHCData/lhc-sm-hwc/-/raw/master/figures/it/PNO.D16_current_pcs.png" width=75%> | ||
<img src="https://gitlab.cern.ch/LHCData/lhc-sm-hwc/-/raw/master/figures/it/PNO.D16_current_magnets.png" width=75%> | ||
<center>Currents vs time for test PNO.D16</center> | ||
The offline analysis is given in the table below: | ||
|Responsible|Type of analysis|Criteria| | ||
|-----------|----------------|--------| | ||
|PC|Verification of the tracking error between I_REF and I_MEAS for the three PC's|I_ERR < 10 ppm| | ||
|~|~|I_EARTH < 10 mA (online checked by the sequencer)| | ||
|MP3|Calculate splice resistances|R_max < 5 nOhm| | ||
|MP3|Check DFB regulation|T_top_HTS (TT891A) = 50 +/- 4K| | ||
|~|~|T_top_Cu (TT893) = 293 +/- 10 K| | ||
|MP3|Check margin between U_RES and the QPS threshold|U_RES < 30 mV for both boards at the start of the PC fault| | ||
source: Test Procedure and Acceptance Criteria for the Inner Triplet Circuits in the LHC, MP3 Procedure, <a href="https://edms.cern.ch/document/874886/2.1">https://edms.cern.ch/document/874886/2.1</a> | ||
%% Cell type:markdown id: tags: | ||
# Analysis Assumptions | ||
- We consider standard analysis scenarios, i.e., all signals can be queried. Depending on what signal is missing, an analysis can raise a warning and continue or an error and abort the analysis. | ||
- In case an analyzed signal can't be queried, a particular analysis is skipped. In other words, all signals have to be available in order to perform an analysis. | ||
- It is recommended to execute each cell one after another. However, since the signals are queried prior to an analysis, any order of execution is allowed. In case an analysis cell is aborted, the following ones may not be executed (e.g. I\_MEAS not present). | ||
# Plot Convention | ||