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https://cern.zoom.us/j/63913530325?pwd=NHh2VEtQSkVEMXFaQlRDOVYxYVd1QT09
Speakers, please fill this template of the minutes prior to the meeting: https://codimd.web.cern.ch/Q1aW0kvRStitlMtDow6XTg?both
Minutes of the PS-SPS Users Meeting held on 18th November 2021
PS Machine Report (B. Mikulec/B. Salvant)
Availability was 85% since last Thursday.
Issues:
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There has been several issues with 10 MHz RF cavities during the weekend (1h15 without AD and TOF to replace a power supply and a tuning module on cavity 11), but we decided to avoid accessing the machine immediately to repair the C10-36 cavity that had a faulty relay gap in order to try and maximize the time for Fixed Target beams in SPS in particular.
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EAST beams had to be stopped for 1h30 on Friday due to a trip of SMH57, which was caused by wrong settings that caused a parasitic TOF bunch to be lost on the septum.
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The failure of IT network switch caused a long stop for TOF on Friday night (8h without beam), as the communication with RP monitors and the external condition on the nTOF target were lost.
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The Linac3 High Voltage modulator was in fault during the night of Friday to Saturday and could not be restarted. The ion Run in the EAST area during the weekend had been discussed very late with the Linac3 team, while no support or piquet was normally planned on weekends for ions during the 2021 Run. In spite of all this, a PS coordinator had volunteered to provide best effort and was very kind to come on site and call the SY-EPC piquet, who was also very kind to intervene. The IGBT exchange was a heavy intervention that mobilized a lot of resources (10h downtime for ions). This intervention saved the ion Run for EAST. Next time, it is important that such unsual requests are communicated well in advance to the relevant teams and machines.
Progress and tests:
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nTOF
- the MD on FTN line steering continued during the week and the weekend and an optimizer on beam losses was used. The conclusion of the SY-ABT experts is that the beam is too large to fit in the transfer line and more discussions are needed to see how to proceed.
- Vertical and horizontal beam displacements on target and intensity scans were requested by nTOF and completed.
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EAST
- The revolution frequency excursion had been different on EAST and was identified as a well hidden Btrain setting with wrong value.
- The ion run could take place thanks to the heavy Linac3 intervention mentioned above.
- After the T11 DSO tests, the beam permit was signed on Saturday morning and the tuning of the T11 line could happen on Saturday and Sunday.
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MTE
- The request for intensity increase was not very succesful as a lot of tuning is needed.
- Spill was not very flat, horizontal core emittance twice larger than islands, and transmission was poor.
- It is important to plan and prepare such intensity increases on MTE in the future.
SPS Machine Report (V. Kain)
NA gas during YETS (M.Jeckel)
Gas requirements during YETS 2021 – 2022 needs to be communicated. Gas type / flow rate / start and end date. Power lock out for EHN1 is foreseen from Friday 14.01.2022 to 23.02.2022.
SAFETY (Evelyne Dho, James Devine & Letizia Di Giulio)
PPE Reminder
Helmet and safety shoes are mandatory for all beam line areas (157 and EHN1).
COVID-19: Masks are also required at all times within all CERN buildings unless you are alone in your own office.
Failure to wear safety equipment is a professional fault, please ensure you are following the rules!
ISIEC forms
System will be offline from 15th November for Drupal upgrade. We will be reviewing the form to make it more intuitive for next year. If you have a request after this please contact ep-adso@cern.ch.
Reminder: Power cuts during YETS period
Decabling period - 19/01/22 to 23/02/22. The power cut will start on 14/1/22.
If you have equipment that needs to be powered during this period please contact James (168824/jdevine@cern.ch).
We are already making plans for special arrangements for NA61 and the Neutrino platform, and GIF++.
East Area users tour de table
EA beams status (D. Banerjee / J. Bernhard)
T9 and T10 operation successfully completed during the last week.
Successful commissioning of the T11 line on the last weekend with beam.
T8: IRRAD and CHARM (F. Ravotti & G. Pezzullo)
Federico by e-mail: The run of IRRAD/CHARM ended well on Sunday night: after stopping irradiation experiments on Friday afternoon in both IRRAD/CHARM areas the weekend has been devoted to perform an optics MD for the proton beam (that needs to be optimized for next year run concerning the spill-to-spill stability and the uniformity of the beam profile along the beamline). The weekend was also used to test the extraction of a high-energy ion beam towards T8 in order to prepare the dedicated HI run which has been requested in 2022. About the weekend, all planned measurements have been performed successfully. We will analyse the data in the YETS to better plan the commissioning run of our facility in 2022. At the next week meeting I will present the statistics of the performed irradiation experiments in IRRAD/CHARM
T9: TOTEM (F. Garcia)
The test beam was successfully executed. We managed to carry out several scans and to obtain the tomography images of the tiles for: amplitude, signal to noise ratio, rise time and effciency.
In addiiton, several files were used to change from positive to negative hadrons and energies from 1 - 15 GeV.
All interations with the parasitic user and support teams were very smoothly and thanks to all of them.
T9: NP06/ENUBET - parasitic mode (A. Longhin)
We have completed our program successfully. Mainly taken proton enriched sample at 15 GeV at high intensity to verify efficiency and uniformity of our calorimeter. Exposures done frontally, laterally with different models of SiPM photosensors and different overvoltages. We have managed to acquire the downstream (low pressure) Cherenkov analog signal from the cable in the area.
For the future it could be useful to also have the upstream one. We have not succeded in seeing NIM signals from Cherenkov counters (20 ns wide, 1 us delay) from the inputs present in the CR (only the scintillator signal was present). The new CESAR interface for cherenkov is great (even tough the scan feature crashed sometimes and the program gets sluggish sometimes). Thank you for help and support (to TOTEM colleagues also) !
T10 TIMING / PHOS (speaker)
Timing (F. Carnesecchi):
PHOS (M.Ippolitov)
During parasitic run we made a check of the presence of signals from the detectors.
No fine tuning was possible because of the high energy and intensity of the beam.
Energy resolution measured with new FEC32 on-board card is consistent with the reference VME system. Measurements with FEC32 done in the beam momenta range 1-5 GeV/C.Taking into account completely new and unknown beam line and limited time our test beam was very
useful and successful.
n_TOF (Javier Praena)
AWAKE (Edda Gschwendtner, Giovanni Zevi Della Porta)
NA users tour de table
H2: NA61 (Seweryn Kowalski)
During the last few days of the beam we made the test of our detector, which is based on the semiconductor technology used by Alice Alpide chips. No problem with beam and infrastructure
H4: GIF & RD51 week 42+43 (Yorgos Tsipolitis, Martin Jäkel)
- GIF: again sucessful beam time with 14 groups participating. Very good muon beam, optimised for GIF area only. Thanks Nikos !
The (preliminary) results from this beam year for all groups have been presented this Tuesday in our Annual User Meeting and can be seen at “https://indico.cern.ch/e/GIF-AUM-2021”
We are now back in standard Irradiation which we will need to continue until next beam time to achieve the nessesary aging results to be ready for the next beam.
-RD51 (parasitic): two setup profit of the GIF++ beam parasitically collecting useful data for their studies. Really thankful to GIF++ colleagues for this opportunity.
H2/H4 (Nikolaos Charitonidis / Bastien Rae)
H6: ATLAS ITK (A. Rummler, F. Guescini)
Did some limited tests with the new DAQ PC; learnt that there are also some high trigger rate limitations in the software which have to be followed up. Most planned measurements of DUTs had been concluded in the previous week but it was possible to measure some unirradiated samples during phases of moderate beam.
H6: ALICE ITS3 (F.Carnesecchi)
H8: week 44: ATALS Tilecal (Ilya Korolkov)
H8: week 44 and 45: IDEA-ClusterCounting (N. De Filippis)
Beam Lines H6 & H8 (Dipanwita Banerjee and Alexander Gerbershagen)
H6: H6 operation successfully completed during the last week with great co-ordination among the users.
Beam Lines P42 & K12 (Johannes Bernhard)
On Friday, we scanned the P42 beam on the T10 intensity monitor (BSI/TBIU) as well as on the one upstream of it (BSI769) in order to check for potential degradation due to the high intensity proton beam. We saw an effect of about 15% at the T10 BSI, where the beam is small due to the focus on the target. The upstream BSI seems to be much less affected due to the much larger beam size there. Colleagues from beam instrumentation are now analysing the collected data. The reason for the drifting K12 Bend 5 current earlier in the year is now also better understood by the colleagues in EPC. It seems that an operational amplifier was slowly drifting in time, thus affecting the regulation. With the help of the Machine Protection Panel, we are now discussing possible mitigation until the new power converters will become available for the North Area, which will allow separating monitoring and interlocking from the regulation circuit.
K12: NA62 (Chris Parkinson)
Run completed with taking-data continuing until the last burst. This was the first run operating at nominal intensity and overall it was very successful, putting us in an excellent position for the upcoming years. Many thanks to all involved that helped us achieve this goal.
Beam Line M2 (Dipanwita Banerjee)
M2: NA64mu and MuOnE continued data taking during the last days. MuOnE took data parasitically when NA64mu ran with 160 GeV muon beam, however the detector was not well aligned therefore the rate observed was low.
M2: week 43: NA64 mu (Vladimir Poliakov) +
All new detectors large area MM and Straw, also Ecal, veto hadron calorimeter and two modules of hadron calorimeter were commissioning and calibrated. The all detectors were shown good performance. The measurements of hadron contamination in the 160GeV muon beam, comparison of performance two magnetic spectrometers BMS and MBPL were done. Last three days - data taking with trigger on the scattered muon, recorded around 5x10^9 MOT.
parasitically MUON-e (Clara Matteuzzi)
Supercycles, Wobbling, Target intensities
See INDICO agenda for details
AOB
See INDICO agenda for details
Minutes by the respective speakers, edited by E.B. Holzer
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