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Beam status

Beam status

MCR News

23 September 2026 15:44
    Timing issues have been rectified. Beam back on @ 15:35


23 September 2026 13:19
    Controls specialists are still investigating the ongoing timing issues.


23 September 2026 12:00
    Investigations are ongoing with the timing issues preventing us from
    running the Extract Kicker power supplies. Update at 13:00 Hours


23 September 2026 11:03
    The Synchrotron BLM power supply fault has been resolved. We are now
    having issues with the Kicker power supplies again. Equipment specialists
    are still investigating. Update at 12:00 Hours.


23 September 2026 10:30
    We are still experiencing timing issues. We also have a problem with a
    power supply for the Synchrotron beam loss monitors. Diagnostics are
    investigating. Update at 11:00 Hours.


23 September 2026 10:04
    The issue with the power outage to timing distribution crates has been
    resolved and the Kicker power supplies are on. We are now following up
    with a few diagnostics issues. Update at 10:30 Hours.


23 September 2026 09:09
    The issue with the Kicker power supplies has been traced to a timing
    problem.  There is a power outage on two controls racks in the Inner
    Synchrotron. We are waiting for a controls specialist to arrive on site.
    Update at 10:00 Hours.


23 September 2026 08:10
    Investigations are ongoing with the Extract Kicker power supplies. Update
    at 09:00 Hours.


23 September 2026 07:09
    Machine update:-
    
    Experts are on site investigating the problems with the Extract power
    supplies. Update at 08:00hrs.


23 September 2026 05:58
    Machine update:-
    
    Unfortunately we have a problem with one of the extract kicker power
    supplies. machine experts have been consulted, and are now on route to the
    facility to assist with repairs. Update at 07:00hrs


22 September 2026 10:06
    Issues with Linac modulator 1 continue, experts are investigating. Beam
    may be intermittent until problems rectified.


22 September 2026 09:10
    Experts believe the issue with the Linac modulator has been fixed. Beam
    back on @ 09:00


22 September 2026 08:36
    There is still an issue with the Linac modulator. Experts are
    investigating the issues. Beam maybe intermittent.
    Update @ 09:30


22 September 2026 07:44
    There is a problem with Linac modulator, currently in contact with experts.
    Update @ 08:30


20 September 2026 13:55
    Beam back on to both Targets @ 13:55


20 September 2026 13:40
    Experts have managed to fix the issue with the TGT2 interlocks. Beam will
    be switch back to both Targets shortly.


20 September 2026 12:41
    Experts is still working on the issue with TGT2 interlocks.
    Update @13:30


20 September 2026 11:08
    Beam switched to TGT1 running as there is an interlock issue with TGT2
    beamlines. Experts currently looking into problems.
    Update @ 12:00


20 September 2026 03:08
    We are investigating  a water flow fault on Target 2 secondary cooling
    circuit. We will update when we have more information.


20 September 2026 00:48
    Beam on


20 September 2026 00:26
    Our equipment specialist is working on the fault in the Injector. There is
    an issue with the phasing on Tank 2 which is causing transmission problems
    alongside high beam loss. We hope to resolve the problem and restore beam
    soon. Update when we have more information.


19 September 2026 23:57
    Equipment is all on. We now have an issue with beamloss which we are
    investigating. Update at 00:30 Hours


19 September 2026 23:33
    The faulty power supply in the Inner Synchrotron has been repaired. We
    have another issue in the Injector which an equipment specialist is
    looking into. We hope to get beam back on soon but if not we will update
    in 30 Minutes.


19 September 2026 22:52
    We have a failed Trim Quad power supply in the Inner Synchrotron. We have
    investigated and called an equipment specialist to assist. Update at 23:30
    Hours.


18 September 2026 13:07
    Beam running as normal @13:05


18 September 2026 12:41
    The experts have managed to fix the issue with the Ion Source, the MCR
    crew are currently running the machine back up. Beam should resume within
    30 mins


18 September 2026 10:01
    The Ion Source has just experienced a partial blockage. Beam will be
    switch off shortly to allow experts to fix the issue. Expected repair time
    is 2-3 hours.


16 September 2026 05:52
    MS beam restored to both target stations.


16 September 2026 05:33
    Beam set up is ongoing. Rep rates will remain low while machine physicists
    continue to tune.


16 September 2026 04:03
    The ion source has been run up and the output is good. Linac is run up. We
    will now commence beam set up operations.


16 September 2026 04:03
    The ion source has been run up and the output is good. Linac is run up. We
    will now commence beam set up operations.


16 September 2026 02:58
    The ion source has been inspected and a blockage was found which has been
    removed. The equipment expert has refitted the ion source and is now in
    the process of running it up.
    
    Update @ 04:00.


16 September 2026 01:21
    BEAM OFF - We are experiencing an issue with the ion source which caused
    the output to drop. An equipment expert is on route to site to investigate
    further. To do this the ion source needs to be run down, removed and
    inspected.
    
    Update @ 03:00.


15 September 2026 14:53
    N6 IRIS / OSIRIS Main shutter and N6B OSIRIS have had a radiation survey
    and are cleared for beam.


15 September 2026 08:32
    User Run 2026-3 has started.


14 September 2026 12:32
    The following have had Radiation Surveys and are cleared for beam:
    
    MUON - HIFI
    MUON - MuSR
    MUON - EMU
    MUON - Bending magnet


14 September 2026 06:02
    Machine update:-  
    
    The following beam lines have been cleared for beam.
    
    TS1
    
    N1  SANDALS
    N2A ALFRED
    N7  POLARIS
    S1  MAPS
    S3  SXD
    S4  MERLIN
    S6  MARI
    S7  GEM
    S8  ENGIN-X
    
    TS2
    
    W1  CHIPIR
    W6  LET
    W7  NIMROD


13 September 2026 16:20
    The following Beamlines are clear for Beam.
    
    TS1
    
    N8 TOSCA
    N8A INES
    S2 VESUVIO
    S9 PEARL
    
    TS2
    
    E1 ZOOM
    E2 SANS2D
    E3 POLREF
    E4 INTER
    E5 OFFSPEC
    E6 LAMOR
    E8 WISH


05 August 2026 11:26
    Emergency lighting tests have now been completed in the Synchrotron and
    access is now available


12 June 2026 08:31
    User run ended at 08:30.


10 June 2026 12:55
    Diagnostic issue fixed, Beam back on.


10 June 2026 12:26
    Beam OFF - We are currently experiencing some diagnostic issues which are
    related to a faulty power supply. experts are on route. Update at 13:30.


09 June 2026 23:44
    BEAM ON to both targets


09 June 2026 23:33
    Vacuum in EPB1 continues to recover slowly - We are currently locking up
    EPB1 and bringing magnets back on. Update at 00:30


09 June 2026 22:41
    Vacuum experts have completed the leak tests and the vacuum level is
    continuing to recover.
    
    Update @ 23:30.


09 June 2026 21:08
    Vacuum experts are in the process of recovering the vacuum which is nearly
    at a level that will allow them to perform leak testing.
    
    Update @ 22:30.


09 June 2026 19:56
    BEAM OFF - Vacuum experts require access to EPB1 and therefore we are
    unable run beam to TS2 whilst EPB1 is open. 
    
    Update @ 21:00.


09 June 2026 19:50
    BEAM OFF TO TS1 - We have experienced a vacuum rise in EPB1. Vacuum
    experts are on their way to site to investigate the cause of this.
    We have changed modes to run beam to TS2 only.
    
    Update @ 21:00.

ISIS operating schedule

Our upcoming operating schedule. Cycles begin/end at 08:30 on the date specified

Cycle Start End Target station(s) Maintenance day(s) Comments
2026/3 15 Sep 2026 23 Oct 2026 TS1 & TS2 30 Sep 2026 —
2026/4 17 Nov 2026 18 Dec 2026 TS1 & TS2 02 Dec 2026 —
2026/5 02 Feb 2027 25 Mar 2026 TS1 & TS2 17 Feb & 10 Mar 2027 —
LONG SHUTDOWN
2027/1 16 Nov 2027 17 Dec 2027 TS1 & TS2 TBC —
2027/2 22 Feb 2028 31 Mar 2028 TS1 & TS2 TBC —

ISIS operating schedule - future years

We plan to have an extended shutdown for accelerator and beamline work from March to October 2027.  The next proposal access call will open in March 2027 to allocate time from November 2027 to March 2028.

Machine physics schedule

Accelerator physics experiments are performed before and after each user run. Expand this section to see the latest schedule.

Date Shift Mode Rep Rate Task Contacts Notes
31/8/26

Monday

00:00–08:30 4B MS/32
08:30–16:30 4B MS.32 Initial Injector Setup

IPM1-3 commissioning

BK, SK
16:30–00:00 4B MS/32 Initial Injector Setup

IPM1-3 commissioning

HVC Injector and HEDS quad setup
1/9/26

Tuesday

00:00–08:30 4B MS/32
08:30–16:30 4B MS/32 Initial Synchrotron Setup REW, EA Injector and HEDS quad setup
16:30–00:00 4B MS Initial Synchrotron Setup DJA
2/9/26

Wednesday

00:00–08:30 4B MS
08:30–14:00 4B MS Synchrotron Setup

EPB2 Alignment

HVC, CJ
14:00-16:30 4B MS RF Setup AS
16:30–00:00 4B MS Synchrotron Setup REW, HR
3/9/26

Thursday

00:00–08:30 4B MS
08:30–14:00 5 MS, MS2/8 Synchrotron Setup

EPB1 Alignment

BPM Acceptance Tests

HVC, SK, KF HEDS Chopper Required
14:00-16:30 5 MS, MS2/8 SP6 Bump Tests SK HEDS Chopper Required
16:30–00:00 5 MS Synchrotron Setup CMW, EA
4/9/26

Friday

00:00–08:30 5 MS
08:30–16:30 5 MS Linac FFDD->FODO studies SA, REW
16:30-18:30 5 MS RF Setup AS
18:30–00:00 5 MS Synchrotron Setup HVC, JBL Final focus investigations
5/9/26

Saturday

00:00–08:30 5 MS
08:30–16:30 5 MS/32 RFQ LLRF Control Tests AS
16:30–00:00 5 MS/32 High Intensity Running DJA
6/9/26

Sunday

00:00–08:30 5 MS/32
08:30–16:30 5 MS/32 Half-integer resonance studies CMW, HVC SRM, HEDS Chopper Required
16:30-20:30 5 MS/32 Tune Scan EA, HVC SRM
20:30–00:00 5 MS/32 Schottky measurements CJ SRM, HEDS Chopper Required
7/9/26

Monday

00:00–08:30 5 MS/32 (run on if required) CJ SRM, HEDS Chopper Required
08:30–16:30 5 MS/32 Space charge studies REW, FS BSRM
16:30–00:00 5 MS/32 AC Dipole operation for resonant driving term CJ BSRM
8/9/26

Tuesday

00:00–08:30 5 MS/32
08:30–14:00 5 MS Synchrotron Setup

HEDS Chopper Synchronisation Tests

HVC, OC, DK HEDS Chopper Required
14:00-16:30 5 MS TS2 Halo Checks AB, RG, Crew
16:30–00:00 5 MS Synchrotron Setup CMW, HR
9/9/26

Wednesday

00:00–08:30 5
08:30–16:30 5 MS Diagnostics Testing (EPB1 BLM Head Amps, EPB Intensity Monitors, EPB2 MUXs, R0IM testing) JFG (HVC)
16:30–00:00 5 MS Synchrotron Setup REW, SK
10/9/26

Thursday

00:00–08:30 5 MS
08:30–14:00 5 MS Synchrotron Setup

EPB steering magnet criticality checks

HVC, HR, SG +TC105 investigations with SG if possible
14:00-16:30 5 MS LEBT Optimisation & Phasensonde Training Data REW, RB, IF
16:30–00:00 5 MS Synchrotron Setup DJA
11/9/26

Friday

00:00–08:30 5 MS
08:30–18:30 5 MS Synchrotron Setup REW, EA
18:30–00:00 5 MS Synchrotron Setup HVC
12/9/26

Saturday

00:00–08:30 5 MS
08:30–16:30 5 MS Synchrotron Setup EA, SK
16:30–00:00 5 MS High Intensity Running DJA
13/9/26

Sunday

00:00–08:30 5 MS
08:30–16:30 5 MS High Intensity Running HVC
16:30–00:00 5 MS Radiation Surveys HP Section

Previous cycles

CycleStartEndTarget station(s)Maintenance day(s)Comments
2026/2------------Cycle cancelled
2026/1​05 May 202612 Jun 2026​​​TS1 & TS2​20 May 2026
2025/517 Feb 202630 Mar 2026​​TS1 & TS24 Mar 2026
2025/418 Nov 202519 Dec 2025​​TS1 & TS203 Dec 2025
2025/3​09 Sep 202517 Oct 2025​​​TS1 & TS2​24 Sep 2025
2025/2​​01 Jul 2025​08 Aug 2025​​TS1 & TS216 Jul 2025Cycle cancelled
2025/1​29 Apr 202506 Jun 2025​​​TS1 & TS2​​14 May 2025
2024/5​18 Feb 2025​​28 Mar 2025​​TS1 & TS205 Mar 2024
2024/419 Nov 2024​​20 Dec 2024​​TS1 & TS2​​​04 Dec 2024​
2024/317 Sep 202420 Dec 2024TS1 & TS204 Dec 2024
2024/209 Jul 202409 Aug 2024TS1 & TS205 Mar 2024
2024/123 Apr 202431 May 2024TS1 & TS208 May 2024
2023/513 Feb 202422 Mar 2024TS1 & TS228 Feb 2024
2023/414 Nov 202319 Dec 2023TS1 & TS229 Nov 2023
2023/319 Sep 202320 Oct 2023TS1 & TS204 Oct 2023
2023/227 Jun 202304 Aug 2023TS1 & TS212 Jul 2023
2023/125 Apr 202326 May 2023TS2 Only
(TS1 Commissioning)
10 May 2023