"source: Test Procedure and Acceptance Criteria for the 600 A Circuits, MP3 Procedure, <a href=\"https://edms.cern.ch/document/874716/5.3\">https://edms.cern.ch/document/874716/5.3</a>"
"source: Test Procedure and Acceptance Criteria for the 600 A Circuits, MP3 Procedure, <a href=\"https://edms.cern.ch/document/874716\">https://edms.cern.ch/document/874716</a>"
]
},
{
...
...
@@ -66,7 +66,6 @@
"print('Loading (14/15)'); from lhcsmapi.gui.pc.FgcPmSearchModuleMediator import FgcPmSearchModuleMediator\n",
"print('Loading (15/15)'); from lhcsmapi.metadata.SignalMetadata import SignalMetadata\n",
source: Test Procedure and Acceptance Criteria for the 600 A Circuits, MP3 Procedure, <ahref="https://edms.cern.ch/document/874716/5.3">https://edms.cern.ch/document/874716/5.3</a>
source: Test Procedure and Acceptance Criteria for the 600 A Circuits, MP3 Procedure, <ahref="https://edms.cern.ch/document/874716">https://edms.cern.ch/document/874716</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.
- 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
- Scales are labeled with signal name followed by a comma and a unit in the square bracket, e.g., I_MEAS, [A]
- If a reference signal is present, it is represented with a dashed line
- If the main current is present, its axis is on the left. Remaining signals are attached to the axis on the right. The legend of these signals is located on the lower left and upper right, respectively.
- The grid comes from the left axis
- Title contains timestamp, circuit name, signal name allowing for re-access the signal.
- The plots assigned to the left scale got colors: blue (C0) and orange (C1). Plots presented on the right have colors red (C2) and green (C3).
- Each plot has an individual time-synchronization mentioned explicitly in the description.
- If an axis has a single signal, change color of the label to match the signal's color. Otherwise, the label color is black.
In order to perform the analysis of a FPA in an RCD/O 600A circuit please:
1. Select circuit name (e.g., RC.A12B1)
2. Choose start and end time
3. Choose analysis mode (Automatic by default)
Once these inputs are provided, click 'Find FGC PM entries' button. This will trigger a search of the PM database in order to provide a list of timestamps of FGC events associated with the selected circuit name for the provided period of time. Select one timestamp from the 'FGC PM Entries' list to be processed by the following cells.
**Note that 24 hours is the maximum duration of a single PM query for an event. To avoid delays in querying events, please restrict your query duration as much as possible.**
The analysis for MP3 consists of checking the existence of PM file and of consistency of the PM timestamps (PC, QPS). The criterion of passing this test described in detail in 600APIC2.
In short the following criteria should be checked:
- 2 PM DQAMGNA (A+B) files and 1 PM EE file should be generated for 600 A circuits with EE
- Difference between QPS board A and B timestamp = 1 ms
- PC timestamp is QPS timestamp +/- 20 ms
If one or more of these conditions are not fulfilled, then an in-depth analysis has to be performed by the QPS team.
The quench voltage U_RES is calculated according to the following formula:
\begin{equation}
U_{\text{RES}} = U_{\text{DIFF}} + L d/dt (I+U_{\text{DIFF}}/R).
\end{equation}
Note that I_DCCT is the QPS signal name, even though the current is actually measured not with a DCCT, but with a LEM detector, hence the poorer quality w.r.t. to the FGC I_A/B/MEAS signals that are measured with a DCCT.
It can be seen from the sign convention in the figure below that a resistive voltage always has opposite sign to the measured current.
As U_DIFF contributes directly to U_RES, the resolution of U_RES is, at least partially, limited by that of U_DIFF. Moreover, U_RES is affected by the noisy time derivative of the current signal.
The QPS signals that are communicated to the post-mortem system have only 12 bit resolution.
## 5.1. Resistive Voltage
*ANALYSIS*:
- Check if the U_RES signal before a quench is increasing for at least one board, which would indicate a QPS trip
- Calculate the initial voltage slope of U_RES signal. The slope is calculated as a ratio of the voltage change from 50 to 200 mV and the corresponding time change.
*GRAPHS*:
First plot (U_RES and I_MEAS prior to a quench)
- t = 0 s corresponds to the FGC timestamp
Second plot (U_RES and the initial slope of U_RES)
- Check the integrity of all four signals (U_DIFF, I_DCCT, I_DIDT and U_RES). If one of the signals (especially U_DIFF or I_DCCT) stays at zero or shows wrong values the cabling of this quench detector could have issues. Compare U_DIFF (measured signal) to U_REF (signal compensated for inductive voltage).
*CRITERIA*
-**U_RES < 0.7*100 mV and noise of U_RES on the plateaus < 20mV**
analysis_rcbxh.results_table['FPA Reason']=get_expert_decision('Reason for FPA: ',['QPS trip','Converter trip','EE spurious opening','Spurious heater firing','Busbar quench','Magnet quench','HTS current lead quench','RES current lead overvoltage','Unknown'])
analysis_rcbxh.results_table['Type of Quench']=get_expert_decision('Type of Quench: ',['Training','Heater-provoked','Beam-induced','GHe propagation','QPS crate reset','Single Event Upset','Short-to-ground','EM disturbance','Unknown'])
analysis_rcbxh.results_table['QDS trigger origin']=get_expert_decision('QDS trigger origin: ',['QPS','HTS current lead','RES current lead','Busbar'])
"source: Test Procedure and Acceptance Criteria for the 600 A Circuits, MP3 Procedure, <a href=\"https://edms.cern.ch/document/874716/5.3\">https://edms.cern.ch/document/874716/5.3</a>"
"source: Test Procedure and Acceptance Criteria for the 600 A Circuits, MP3 Procedure, <a href=\"https://edms.cern.ch/document/874716\">https://edms.cern.ch/document/874716</a>"
]
},
{
...
...
@@ -73,7 +72,6 @@
"print('Loading (14/15)'); from lhcsmapi.gui.pc.FgcPmSearchModuleMediator import FgcPmSearchModuleMediator\n",
"print('Loading (15/15)'); from lhcsmapi.metadata.SignalMetadata import SignalMetadata\n",
source: Test Procedure and Acceptance Criteria for the 600 A Circuits, MP3 Procedure, <ahref="https://edms.cern.ch/document/874716/5.3">https://edms.cern.ch/document/874716/5.3</a>
source: Test Procedure and Acceptance Criteria for the 600 A Circuits, MP3 Procedure, <ahref="https://edms.cern.ch/document/874716">https://edms.cern.ch/document/874716</a>
%% Cell type:markdown id: tags:
# Analysis Assumptions
- We consider standard analysis scenarios, i.e., all signals can be queried. If a signal is missing, an analysis can raise a warning and continue or an error and abort the analysis.
- It is recommended to execute each cell one after another. However, since the signals are queried prior to 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
- Scales are labeled with signal name followed by a comma and a unit in square brackets, e.g., I_MEAS, [A].
- If a reference signal is present, it is represented with a dashed line.
- If the main current is present, its axis is on the left. Remaining signals are attached to the axis on the right. The legend of these signals is located on the lower left and upper right, respectively.
- The grid comes from the left axis.
- The title contains timestamp, circuit name, and signal name allowing to re-access the signal.
- The plots assigned to the left scale have colors: blue (C0) and orange (C1). Plots presented on the right have colors red (C2) and green (C3).
- Each plot has an individual time-synchronization mentioned explicitly in the description.
- If an axis has a single signal, then the color of the label matches the signal's color. Otherwise, the label color is black.
In order to perform the analysis of a FPA in an RCD/O 600A circuit please:
1. Select circuit name (e.g., RC.A12B1)
2. Choose start and end time
3. Choose analysis mode (Automatic by default)
Once these inputs are provided, click 'Find FGC PM entries' button. This will trigger a search of the PM database in order to provide a list of timestamps of FGC events associated with the selected circuit name for the provided period of time. Select one timestamp from the 'FGC PM Entries' list to be processed by the following cells.
**Note that 24 hours is the maximum duration of a single PM query for an event. To avoid delays in querying events, please restrict your query duration as much as possible.**
The analysis for MP3 consists of checking the existence of PM file and of consistency of the PM timestamps (PC, QPS). The criterion of passing this test described in detail in 600APIC2.
In short the following criteria should be checked:
- 2 PM DQAMGNA (A+B) files and 1 PM EE file should be generated for 600 A circuits with EE
- Difference between QPS board A and B timestamp = 1 ms
- PC timestamp is QPS timestamp +/- 20 ms
If one or more of these conditions are not fulfilled, then an in-depth analysis has to be performed by the QPS team.
The quench voltage U_RES is calculated according to the following formula:
\begin{equation}
U_{\text{RES}} = U_{\text{DIFF}} + L d/dt (I+U_{\text{DIFF}}/R).
\end{equation}
Note that I_DCCT is the QPS signal name, even though the current is actually measured not with a DCCT, but with a LEM detector, hence the poorer quality w.r.t. to the FGC I_A/B/MEAS signals that are measured with a DCCT.
It can be seen from the sign convention in the figure below that a resistive voltage always has opposite sign to the measured current.
As U_DIFF contributes directly to U_RES, the resolution of U_RES is, at least partially, limited by that of U_DIFF. Moreover, U_RES is affected by the noisy time derivative of the current signal.
The QPS signals that are communicated to the post-mortem system have only 12 bit resolution.
%% Cell type:markdown id: tags:
## 5.1. Resistive Voltage
*ANALYSIS*:
- Check if the U_RES signal before a quench is increasing for at least one board, which would indicate a QPS trip
- Calculate the initial voltage slope of U_RES signal. The slope is calculated as a ratio of the voltage change from 50 to 200 mV and the corresponding time change.
*GRAPHS*:
First plot (U_RES and I_MEAS prior to a quench)
- t = 0 s corresponds to the FGC timestamp
Second plot (U_RES and the initial slope of U_RES)
- Check the integrity of all four signals (U_DIFF, I_DCCT, I_DIDT and U_RES). If one of the signals (especially U_DIFF or I_DCCT) stays at zero or shows wrong values the cabling of this quench detector could have issues. Compare U_DIFF (measured signal) to U_REF (signal compensated for inductive voltage).
*CRITERIA*
-**U_RES < 0.7*100 mV and noise of U_RES on the plateaus < 20mV**
analysis_rco.results_table['FPA Reason']=get_expert_decision('Reason for FPA: ',['QPS trip','Converter trip','EE spurious opening','Spurious heater firing','Busbar quench','Magnet quench','HTS current lead quench','RES current lead overvoltage','Unknown'])
analysis_rco.results_table['Type of Quench']=get_expert_decision('Type of Quench: ',['Training','Heater-provoked','Beam-induced','GHe propagation','QPS crate reset','Single Event Upset','Short-to-ground','EM disturbance','Unknown'])
analysis_rco.results_table['QDS trigger origin']=get_expert_decision('QDS trigger origin: ',['QPS','HTS current lead','RES current lead','Busbar'])
"source: Test Procedure and Acceptance Criteria for the 600 A Circuits, MP3 Procedure, <a href=\"https://edms.cern.ch/document/874716/5.3\">https://edms.cern.ch/document/874716/5.3</a>"
"source: Test Procedure and Acceptance Criteria for the 600 A Circuits, MP3 Procedure, <a href=\"https://edms.cern.ch/document/874716\">https://edms.cern.ch/document/874716</a>"
]
},
{
...
...
@@ -73,7 +72,6 @@
"print('Loading (14/15)'); from lhcsmapi.gui.pc.FgcPmSearchModuleMediator import FgcPmSearchModuleMediator\n",
"print('Loading (15/15)'); from lhcsmapi.metadata.SignalMetadata import SignalMetadata\n",
source: Test Procedure and Acceptance Criteria for the 600 A Circuits, MP3 Procedure, <ahref="https://edms.cern.ch/document/874716/5.3">https://edms.cern.ch/document/874716/5.3</a>
source: Test Procedure and Acceptance Criteria for the 600 A Circuits, MP3 Procedure, <ahref="https://edms.cern.ch/document/874716">https://edms.cern.ch/document/874716</a>
%% Cell type:markdown id: tags:
# Analysis Assumptions
- We consider standard analysis scenarios, i.e., all signals can be queried. If a signal is missing, an analysis can raise a warning and continue or an error and abort the analysis.
- It is recommended to execute each cell one after another. However, since the signals are queried prior to 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
- Scales are labeled with signal name followed by a comma and a unit in square brackets, e.g., I_MEAS, [A].
- If a reference signal is present, it is represented with a dashed line.
- If the main current is present, its axis is on the left. Remaining signals are attached to the axis on the right. The legend of these signals is located on the lower left and upper right, respectively.
- The grid comes from the left axis.
- The title contains timestamp, circuit name, and signal name allowing to re-access the signal.
- The plots assigned to the left scale have colors: blue (C0) and orange (C1). Plots presented on the right have colors red (C2) and green (C3).
- Each plot has an individual time-synchronization mentioned explicitly in the description.
- If an axis has a single signal, then the color of the label matches the signal's color. Otherwise, the label color is black.
In order to perform the analysis of a FPA in an 600A circuit with/without EE please:
1. Select circuit family (e.g., RCS)
2. Choose start and end time
3. Choose analysis mode (Automatic by default)
Once these inputs are provided, click 'Find FGC PM' button entries'. This will trigger a search of the PM database in order to provide a list of timestamps of FGC events associated with the selected circuit name for the provided period of time. Select one timestamp from the 'FGC PM Entries' list to be processed by the following cells.
**Note that 24 hours is the maximum duration of a single PM query for an event. To avoid delays in querying events, please restrict your query duration as much as possible.**
The analysis for MP3 consists of checking the existence of PM file and of consistency of the PM timestamps (PC, QPS, EE if applicable). The criterion of passing this test described in detail in 600APIC2.
In short the following criteria should be checked:
- 2 PM DQAMGNA (A+B) files and 1 PM EE file should be generated for 600 A circuits with EE
- Difference between QPS board A and B timestamp = 1 ms
- PC timestamp is QPS timestamp +/- 20 ms
- EE timestamp is +/-20 ms from the QPS timestamp
If one or more of these conditions are not fulfilled, then an in-depth analysis has to be performed by the QPS team.
