LS2 LHC BLM activities
Main activity for the LHC is the removal of BLM detectors and cable-trays for allowing the cryo-module diode consolidation campaign (DISMAC). During LS2, approx. 40% of the LHC BLM system deployed in the tunnel will be temporary removed and following the completion of DISMAC will be re-installed and re-tested.Step 2: Re-installation and first verification check [ON-GOING]
Evolution of the re-installation task:
The following pictures show the evolution and current status of the re-installation task
Note: The grey bands indicate the main locations, i.e. at which sector, the activity took place. During several periods the activity had to shift between sectors to avoid access constrains and this is not indicated to simplify visualisation. For exact dates one should consult the tracking file linked below.
Additional removal of detectors:
The following picture shows the current evolution of additional detector removals to support various activities
Note: Removal of detectors that have been already re-installed and had to be removed second time to support DISMAC non-conformities found are not accounted here.
Evolution of HV tests:
The following picture shows the evolution of the HV tests. This implies to check the HV connections to all detectors and the correct functioning of the DAC CFC cards. Most common fauls are missing or damaged connector, CFC card disconnected or with errors.
Evolution of the storage boxes recovery task:
The following picture shows the evolution of the storage boxes recovery task distributed at the start of the activity to provide a temporary safe storage location for all the material, i.e. detectors, supports, cables and electronics, necessary to be removed for the interconnect opening or magnet exchanges.
Evolution of the BLM labels installation task:
The following picture shows the evolution of the installation of the BLM labels. These labels (one per monitor and one per location) identifies the monitor, they include a QR code to be read with the TIM train for the automatic and autonomous radiation test.
Detector HV power supplies state:
Step 1: Removal of detectors and cable-trays [COMPLETED]
The removal of all BLM detectors and cable trays concerning DISMAC is complete:
Relevant presentations to the activity:
- DISMAC#29 - 4th Oct. 2018, BLM activities , C. Zamantzas
- DISMAC Readiness Review - 27th Nov. 2018, DISMAC Readiness Review - LHC BLM System , C. Zamantzas
- DISMAC#41 - 14th Feb. 2019, Update on BLM activities , C. Zamantzas
- DISMAC#44 - 7th Mar. 2019, First Removals , C.Zamantzas
- Machine Protection Workshop, 7th May 2019, LHC BLM system: Status and Updates during LS2+ , C.Zamantzas
- DISMAC Mid Term Status Report, 21st Nov. 2019 Status Report, J.Ph. Tock
- DISMAC#64 - 5th Mar. 2020, BLM Update & Dashboard , C. Zamantzas
- DISMAC#65 - 9th Apr. 2020, BLM Re-installation Update , C. Zamantzas
- LS2C#54 - 17th Apr. 2020, Scenario for progressive restart of LS2 activities, , J.M. Jimenez
- DISMAC#69 - 4th June 2020, BLM Re-installation Update , B. Salvachua
- DISMAC#71 - 16th July 2020, BLM Activity Status & Pending Tasks , C. Zamantzas
- DISMAC#75 - 17th Sep. 2020, BLM re-installation Status, B. Salvachua
Links related to the activity:
- VIC for BLM and cable tray removal IMPACT/VIC 31969
- BLM removal procedure EDMS 2085958
- BLM re-installation procedure EDMS 2085960
- Additional Safety Measures in Response to COVID-19 for the DISMAC BLM Activities EDMS 2371178
- Removal and Re-installation tracking (DISMAC/SIT/VSC) LS2-BLM-LHC-DISMAC.xlsx
- Distribution of storage boxes: DONE
- Removal of all BLM and cable trays: DONE
- Reinstallation of all BLM and cable trays: ON-GOING
- Removal of storage boxes: DONE
- Distribution of barcode labels: PAUSED
- Restart of the HV power supplies: DONE
- Modulation/connectivity checks of the installation: ON-GOING
- Repair of broken connections: NOT STARTED
- Interface to WISH2: WISH2 web link
- HV test tracking: LS2-BLM-LHC-HV-TEST.xlsx (Access restricted to the BLM team. If you need read/edition access, please contact any BLM team member.)
- 2021 BLM system checks tracking: LS2-BLM-System-Status.xlsx
IMPACTs (for DISMAC activities only):
Description | IMPACT No |
---|---|
DISMAC interventions in S81 | 130685 |
DISMAC interventions in S12 | 133977 |
DISMAC interventions in S23 | 133981 |
DISMAC interventions in S34 | 141306 |
DISMAC interventions in S45 | 141307 |
DISMAC interventions in S56 | 137661 |
DISMAC interventions in S67 | 142627 |
DISMAC interventions in S78 | 142629 |