Beam status

MCR News

21 February 2026 13:31
    We briefly established base rate beam before being tripped back off by the
    TS2 decoupled moderator. Target staff are on the way to site to
    investigate. We will run beam to TS1 only in the meantime.


21 February 2026 11:49
    The water leak in the outer synchotron has been fixed. Any associated
    equipment is back on and working. We will lock the area back up and run
    the main magnet power supply back up to full level. Update at 13:00.


21 February 2026 09:13
    We have found a water leak from a magnet insulator in the synchrotron.
    This was causing the problem we had earlier with the beam loss monitors.
    Mechanical staff are on site to change the insulator. Update at 11:30.


21 February 2026 07:10
    Beam is currently off whilst our diagnostics specialists address an issue
    the synchrotron beam loss monitors.


20 February 2026 21:22
    Attention all users:
    
    Beam to both target stations will be intermittent over the next few hours
    to allow our Physicists to set up beam to Target Station 2.


20 February 2026 21:16
    Attention TS2 users:
    
    Shutter checks are now complete.
    The following beamlines are cleared for beam:
    
    W6 LET 
    W7 NNIMROD
    W1 CHIPIR NOT CLEARED-REQUIRES A RADIATION SURVEY
    W5 IMAT NOT CLEARED-REQUIRES A RADIATION SURVEY
    
    E1 ZOOM (SHUTTER IS OPEN)
    E2 SANS2D
    E3 POLREF
    E4 INTER (SHUTTER IS OPEN)
    E5 OFFSPEC
    E6 LARMOR
    E8 WISH (SHUTTER IS OPEN)
    
    All cleared beamlines have control of the shutters.


20 February 2026 15:43
    We are shortly coming to the end of the TS2 machine checks. Full beam will
    be reinstated to TS1 when they are finished. At 20:00 hrs this evening TS2
    beam alignment will commence with base rate beam. Beam will be
    intermittent to both targets whilst this is conducted. Any problems,
    please ring the MCR.


20 February 2026 14:00
    We will soon be in a position to start our TS2 checks to enable us to
    bring it online. The machine will be intermittent whilst we do this
    operation.


20 February 2026 07:07
    Beam ON


20 February 2026 06:30
    After contacting equipment experts we replaced the failed steering magnet
    power supply. However, this was not successful and so equipment experts
    are now on their way to site to investigate further. 
    
    Update @ 07:30.


20 February 2026 05:50
    BEAM OFF - There is an issue with one of the synchrotron steering magnet
    power supplies and we have gained access to the inner synch to investigate
    further.
    
    Update @ 06:30.


19 February 2026 10:39
    Machine update:-
    
    Some target 2 beam intensity has been displayed on the beam intensity
    page. This is due to calibration testing and setup of the intensity
    monitors. No beam is being transported to target 2, so please ignore any
    displays whilst setup is continuing.
    
    Target 2 repairs will be continually updated.


17 February 2026 21:21
    Machine update:-
    
    Beam restored to Target 1.


17 February 2026 20:30
    Machine update:-
    
    Experts are on site trying to rectify the fault. The fault has been
    identified with a power supply and is being changed at the moment. Update
    21:00hrs.


17 February 2026 19:05
    Machine update:-
    
    We have problems with the extract kickers. Experts have been contacted and
    are on route to help with repairs. Update 20:30hrs


17 February 2026 13:20
    The following Beamlines are also cleared for beam:
    
    RIKEN PORT 2
    RIKEN PORT 3
    RIKEN PORT 4
    RIKEN KICKER
    MUON HIFI
    MUON MuSR
    MUON EMU
    MUON BENDING MAGNET
    
    N6 IRIS/OSIRIS MAIN
    N6A IRIS


17 February 2026 10:44
    Attention all Target Station 1 users.
    
    The following beamlines are cleared for beam:
    
    N1 SANDALS
    N2 ALFRED
    N3 SURF
    N4 CRISP
    N5 LOQ
    N7 POLARIS
    N8 TOSCA
    N8A INES
    N9 EMMA
    
    S1 MAPS
    S2 VESUVIO
    S3 SXD
    S4 MERLIN
    S6 MARI
    S7 GEM
    S8P ENGIN-X
    S8X ENGIN-X
    S9 PEARL


17 February 2026 08:30
    User Run 2025/5 has started.


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