Beam status

MCR News

20 December 2025 07:55
    Beam to SYNCHROTRON ROOM BEAM DUMP has finished. Access to the R6 area can
    continue as normal.


19 December 2025 20:01
    At 21:00 Beam will be set to SYNCHROTRON ROOM BEAM DUMP. Please do not
    enter R6 north end via chalk pits, R2 lift to tunnel 3 or R6 bat cave.
    Sign have been placed in these areas.


19 December 2025 08:32
    User run ended at 08:30.


19 December 2025 00:08
    Update:
    
    The issue with the synch RF liquid resistor flows has now been resolved.
    
    BEAM ON


18 December 2025 21:42
    Expert is on route to investigate. Although he has said fix could take
    several hours.
    Update @ 00:30


18 December 2025 21:28
    There is an issue with one of the synch RF liquid resistor flows.
    Currently contacting an expert. Update @ 22:00


18 December 2025 15:00
    TS2 H2 USERS - The H2 moderator is continuing to cool down and should be
    at an operational temperature level in the next few hours. Please continue
    to monitor the temperature and an update will be issued once the
    temperature reaches an operational level.


18 December 2025 13:08
    TS2 USERS - Beam has been restored to TS2. However, the H2 moderator
    temperature is still high but should continue to cool down over the next
    few hours.
    
    Update @ 15:00


18 December 2025 11:12
    Beam has been restored to TS1. 
    
    TS2 USERS - As a result of the mains dip the H2 compressor tripped off
    which has caused the H2 moderator to VETO and warm up. Equipment experts
    are working to get the system running again before they can cool down the
    moderator.
    
    Update @ 13:00.


18 December 2025 10:33
    BEAM OFF - We have suffered a mains dip that has affected a large amount
    of operational equipment. We are in the process of getting equipment back
    on and run up but this will take some time. 
    
    Update @ 11:30.


18 December 2025 10:05
    Beam ON


18 December 2025 09:17
    BEAM OFF - We are experiencing an issue with 1RF2 liquid resistor circuit.
    Equipment experts are in the inner synchrotron working on the fault. 
    
    Update @ 10:00.


17 December 2025 10:44
    Beam running back up.


17 December 2025 10:04
    Beam currently off while investigating a diagnostic issue. Update @ 10:30


17 December 2025 06:14
    Update:
    
    The issue with the collectors has now been resolved.
    
    BEAM ON.


17 December 2025 05:32
    Update:
    
    We are currently investigating an issue with the collectors that looks as
    though it has been causing the increased beam loss in the Synchrotron.
    Update at 06:30


17 December 2025 04:09
    BEAM OFF - We are experiencing high beam loss in the Synchrotron. A machine
        expert is on route to site to assist. Update at 05:30


16 December 2025 17:32
    Beam ON


16 December 2025 17:00
    BEAM OFF - We are experiencing high beam loss in the Synchrotron. Machine
    experts are currently investigating the cause of this.
    
    Update @ 18:00


16 December 2025 06:39
    Target 2 users - Compressor purging and cryo-system cool down has been
    completed quicker than expected.
    
    BEAM ON to both targets.


15 December 2025 12:36
    Target 2 user. Compressor purging and cryo-system cool down is expected to
    take approx 2 days. If all goes well Beam should return Wednesday morning.


15 December 2025 10:44
    Target 2 users. The valve in the compressor that required replacing has
    been changed. Systems are currently being purged, the compressor should be
    ready for a start within the hour. Update @ 12:00


14 December 2025 19:03
    Experts believe they have worked out the issue with Target 2 compressor, a
    failed valve. A replacement valve is currently unavailable this evening,
    they are hoping a replacement can be sourced early tomorrow morning. No
    Beam to Target 2 overnight and update @ 10:30 tomorrow.


14 December 2025 18:32
    Experts are still working on the Target 2 compressor issue. Beam to Target
    2 overnight looks unlikely at the moment. Update @ 20:00


14 December 2025 17:29
    Experts are still working on the compressor for Target 2. Update at 18:30.


14 December 2025 16:28
    Target 2 User. Expert has found compressor has tripped, this effects both
    H2 and CH4 systems. Beam has been switched off to Target 2 while he
    recovers systems. Update @ 17:30


14 December 2025 15:57
    Target 2 Hydrogen users. Expert is currently on route to investigate
    moderator over-temperature VETO. Update before 17:00


14 December 2025 13:34
    Beam back on @ 13:35


14 December 2025 13:20
    There is an issue with a power supply in the inter synch. MCR Team have
    gone in to investigate. Update @ 14:00


14 December 2025 01:20
    Beam is off whilst we address an issue with the Main Magnet Power Supply.
    Update in 30 minutes if we have not resolved the problem by then.


13 December 2025 13:33
    We currently have a problem with some shutter shear pins on TS1 which
    require  beam off to change. This process takes around 15 minutes. We will
    get beam back on ASAP after the the change is complete.


13 December 2025 07:52
    We have had a trip on the main magnet system due to a low waterflow. The
    water flow has been adjusted and other waterflows checked. We are just in
    the process of running the power supply back up. Beam should be back on
    within the next 20 minutes.


12 December 2025 16:06
    Beam ON


12 December 2025 15:15
    TS2 users: The east side pump issue has been rectified.
    
    We are currently off for a waterflow trip in the inner synch. Staff are in
    there adjusting the waterflows. Update at 16:00.


12 December 2025 13:47
    We currently have a problem with the east side oil pump which drives the
    shutters. Staff are aware and will look at the issue ASAP. West side
    shutters should be operating without fault. If there any problems, please
    let the MCR know.


11 December 2025 08:20
    User Coffee and Cake: 3:00pm today, TS2 foyer. All welcome!


10 December 2025 18:02
    Machine update:-
    
    We are suffering beam losses and are in consultation with experts to
    rectify this problem. Beam intensity will fluctuate whilst investigations
    continue.


09 December 2025 16:04
    Beam ON


09 December 2025 15:59
    We have encountered a water flow trip which requires entry to the inner
    synch to adjust. Staff have already made entry to the area. Update at
    16:30.


06 December 2025 04:17
    Machine update:-
    
    Beam restored to both target stations.


06 December 2025 04:04
    Machine update:-
    
    Experts are still trying to rectify the failed power supply in the
    Injector. Update 04:30hrs.


06 December 2025 03:17
    Machine update:-
    
    We are now suffering with a failure of a quad power supply in the
    Injector. Experts are on route to assist with repairs. Update @ 04:00hrs.


06 December 2025 02:31
    Machine update:-
    
    Beam restored to both target stations.


06 December 2025 01:56
    Machine update:-
    
    We have a problem with the liquid resistor flow on one of the RF systems
    in the Inner Synchrotron. We are making entry to the inner to rectify the
    problem. Update 03:00hrs


05 December 2025 13:29
    13:30 Beam back on running as normal.


05 December 2025 12:33
    The Ion Source is now running, machine will require some setting up before
    Beam back to normal. Update @ 13:30


05 December 2025 11:40
    The Ion Source has been changed, just waiting on the vacuum to come down
    before a start is attempted. Update @ 12:30


05 December 2025 10:40
    The Ion Source change started. Update @11:30


05 December 2025 09:38
    The ion Source has been struggling overnight with low output, it has been
    decided to change the Ion Source at 10:30


04 December 2025 08:19
    Beam back on @ 08:00


04 December 2025 04:13
    We have suffered an Ion source failure. An expert is on their way to site
    to carry out a change. Crew members will start the procedure but from this
    point it will be in the region of 3 hours before low level beam is
    re-established. Update at 07:15.


03 December 2025 12:43
    Machine update:-
    
    Machine physics is now completed, and we have resumed normal operation to
    both target stations.