2022-06-26
06:02 |
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2022-06-26
06:02 |
Overview of the Beams from the Injectors
/ Albright, S (CERN) ; Bartosik, H (CERN) ; Bohl, T (CERN) ; Damerau, H (CERN) ; Di, G P (CERN) ; Findlay, A (CERN) ; Forte, V (CERN) ; Fraser, M (CERN) ; Huschauer, A (CERN) ; Kain, V (CERN) et al.
The injectors have delivered different beam types for luminosity production in
the LHC during the 2017 run. Besides the nominal beam with 25 ns spacing and 72
bunches at PS extraction, the batch-compression-merging-splitting (BCMS) beam
with multiples of 48 bunches at extraction from the SPS has been produced [...]
2019 - 6 p.
- Published in : (2019) , pp. 119-124
Fulltext: PDF;
In : 8th Evian Workshop on LHC beam operation, Evian Les Bains, France, 12 - 14 Dec 2017, pp.119-124
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2022-06-26
06:02 |
Can we make the preparation of MDS more efficient?
/ Salvachua, B (CERN)
In 2017, four Machine Development (MD) periods were scheduled at the LHC with
the goal to study beam parameters and new ways to optimise the operation of the
machine (LHC and HL-LHC). Before the start of the studies certain preparation
and coordination is required in order to guarantee a successful MD (if the
machine availability permits) [...]
2019 - 4 p.
- Published in : (2019) , pp. 185-188
Fulltext: PDF;
In : 8th Evian Workshop on LHC beam operation, Evian Les Bains, France, 12 - 14 Dec 2017, pp.185-188
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2022-06-26
06:02 |
Machine recovery and re-qualification
/ Zerlauth, M (CERN) ; Bernardi, M (CERN) ; Bednarek, M (CERN) ; Charifoulline, Z (CERN) ; Carlier, E (CERN) ; Chiggiato, P (CERN) ; Diangelo, G (CERN) ; Giachino, R (CERN) ; Pojer, M (CERN) ; Romera, I (CERN) et al.
Restarting the LHC after the YETS 2017/18 initially included the revalidation of
Sector 12 after its intended warm up and the repetition of powering and machine
checkout tests as a function of the modifications applied to the relevant
systems. This contribution will recall the main activities, the implied risks
and resulting revalidation needs as well as the resulting planning to allow for
an efficient restart of the LHC with beam in 2018 for its last year of physics
operation in Run 2.
2019 - 4 p.
- Published in : (2019) , pp. 193-196
Fulltext: PDF;
In : 8th Evian Workshop on LHC beam operation, Evian Les Bains, France, 12 - 14 Dec 2017, pp.193-196
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2022-06-26
06:02 |
Status of the LHC emittance diagnostics
/ Trad, G (CERN) ; Alexopoulos, A (CERN) ; Baud, G (CERN) ; Bravin, E (CERN) ; Roncarolo, F (CERN) ; Vlachos, S (CERN) ; Wurkner, B (CERN)
Measuring the beam transverse emittance is fundamental in every accelerator, in
particular for the LHC, where its precise determination and preservation is
essential to maximize the luminosity and thus the performance of the colliding
beams. In this contribution, a review of the status of the synchrotron radiation
monitors, the beam gas vertex detector and the wirescanners will be presented
alongside the assessment of the obtained performance [...]
2019 - 5 p.
- Published in : (2019) , pp. 147-151
Fulltext: PDF;
In : 8th Evian Workshop on LHC beam operation, Evian Les Bains, France, 12 - 14 Dec 2017, pp.147-151
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2022-06-26
06:02 |
Machine configuration and parameters
/ Solfaroli Camillocci, M (CERN)
2017 has been a remarkable year for the LHC with more than 50 $fb^{-1}
$ delivered
to ATLAS and CMS and the peak luminosity largely overtaking the design value.
Moreover, quite some time was spent to increase operational knowledge with
technics that will be extremely important in the future, such that RF detuning,
levelling, ATS optics. 2018 will be also a very important year, as a challenging
target will be set to accumulate as much data as possible before the LS2, while
marking the road toward HL-LHC. [...]
2019 - 3 p.
- Published in : (2019) , pp. 209-211
Fulltext: PDF;
In : 8th Evian Workshop on LHC beam operation, Evian Les Bains, France, 12 - 14 Dec 2017, pp.209-211
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2022-06-26
06:02 |
Instrumentation: What to expect next year?
/ Barros, J (CERN) ; Bravin, E (CERN) ; Effinger, E (CERN) ; Gasior, M (CERN) ; Jones, R (CERN) ; Kral, J (CERN) ; Lasch, M (CERN) ; Lefevre, T (CERN) ; Levens, T (CERN) ; Alves, D M Louro (CERN) et al.
This paper presents the expectations for the LHC Beam Instrumentation systems
going into the 2018 run. Planned upgrades during the YETS will be presented and
opportunities for future development, in order to better exploit the available
instrumentation, will be discussed.
2019 - 5 p.
- Published in : (2019) , pp. 203-207
Fulltext: PDF;
In : 8th Evian Workshop on LHC beam operation, Evian Les Bains, France, 12 - 14 Dec 2017, pp.203-207
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2022-06-26
06:02 |
Emittance Evolution in the LHC: From Injection to Collisions
/ Hostettler, M (CERN) ; Antoniou, F (CERN) ; Efthymiopoulos, I (CERN) ; Fuchsberger, K (CERN) ; Iadarola, G (CERN) ; Karastathis, N (CERN) ; Papadopoulou, S (CERN) ; Papaphilippou, Y (CERN) ; Pellegrini, D (CERN)
The emittance of the LHC beams when arriving in collisions is a key parameter
for luminosity. Hence, the emittance of the beams from the injector complex
needs to be preserved as well as possible throughout the cycle for maximum
luminosity [...]
2019 - 4 p.
- Published in : (2019) , pp. 157-160
Fulltext: PDF;
In : 8th Evian Workshop on LHC beam operation, Evian Les Bains, France, 12 - 14 Dec 2017, pp.157-160
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2022-06-26
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2022-06-26
06:02 |
Systems performance: Circuits
/ Antoine, A (CERN) ; Bednarek, M (CERN) ; Charifoulline, Z (CERN) ; Coelingh, G J (CERN) ; D'angelo, G (CERN) ; Denz, R (CERN) ; Montabonnet, V (CERN) ; Nielsen, J (CERN) ; Nisbet, D (CERN) ; Panev, B (CERN) et al.
The performance of the LHC magnet circuits for the proton physics run in 2017 is
evaluated. This contribution focuses on the availability of magnet powering (PC)
and protection systems (QPS, EE, FMCM and Interlocks) and evaluates the impact
of the new deployments, mainly the FGClite and RPADO power converters, on the
overall performance of the machine [...]
2019 - 3 p.
- Published in : (2019) , pp. 55-57
Fulltext: PDF;
In : 8th Evian Workshop on LHC beam operation, Evian Les Bains, France, 12 - 14 Dec 2017, pp.55-57
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