CERN Accelerating science

SPS and CNGS

新增:
2017-11-21
06:57
QPS performance during the 2016 LHC run / Steckert, J (CERN) ; Denz, R (CERN)
The LHC quench protection system consisting of more than 13000 quench detectors and more than 6000 actuators (quench heater power supplies and energy extraction systems) reached an impact availability of 99.49% during the 2016 proton Run. This is an improvement by 80% compared to the 2015 figures. [...]
Geneva : CERN, 2017 - 4 p. - Published in : (2017) , pp. 221-224 Fulltext: PDF;
In : 7th Evian Workshop on LHC beam operation, Evian Les Bains, France, 13 - 15 Dec 2016, pp.221-224

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2017-11-21
06:57
Operational and beam dynamics aspects of the RF system in 2016 / Timko, H (CERN) ; Baudrenghien, P (CERN) ; Brunner, O (CERN) ; Butterworth, A (CERN) ; Esteban Muller J (CERN) ; Shaposhnikova, E (CERN)
The operation of the LHC RF system and beam dynamics studies in 2016 are presented. A fault summary is given, showing a reliable operation. [...]
Geneva : CERN, 2017 - 6 p. - Published in : (2017) , pp. 193-198 Fulltext: PDF;
In : 7th Evian Workshop on LHC beam operation, Evian Les Bains, France, 13 - 15 Dec 2016, pp.193-198

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2017-11-21
06:57
Operational limits from intercepting devices / Bracco, C (CERN) ; Bartmann, W (CERN) ; Calviani, M (CERN) ; Frankl, M I (CERN) ; Fraser, M A (CERN) ; Gilardoni, S (CERN) ; Goddard, B (CERN) ; Kain, V (CERN) ; Lechner, A (CERN) ; Marcone, A Perillo (CERN) et al.
LHC operation in 2016 was limited by the constraints on the maximum allowed intensity in the SPS due to the vacuum leak at the internal dump. The present baseline foresees the replacement of the T1DVG with a new upgraded hardware during the upcoming EYETS. [...]
Geneva : CERN, 2017 - 4 p. - Published in : (2017) , pp. 171-174 Fulltext: PDF;
In : 7th Evian Workshop on LHC beam operation, Evian Les Bains, France, 13 - 15 Dec 2016, pp.171-174

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2017-11-21
06:56
How to improve interactions with the control system / Deghaye, S (CERN)
The availability of the LHC control system has been excellent in 2016, with only 0.11% of the machine unavailability attributed to Controls. Nevertheless, many other criteria can be maximised in order to improve the LHC control system and this paper focuses on the user experience. [...]
Geneva : CERN, 2017 - 6 p. - Published in : (2017) , pp. 161-166 Fulltext: PDF;
In : 7th Evian Workshop on LHC beam operation, Evian Les Bains, France, 13 - 15 Dec 2016, pp.161-166

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2017-11-21
06:56
Injectors: Unavailability by machine, root causes, strategy and limitations / Mikulec, B (CERN) ; Kain, V (CERN)
During the 2016 LHC proton un the main contributor to LHC downtime turns out to be the LHC injector chain. In this paper the corresponding LHC downtime will be assigned to either Linac2, the Proton Synchrotron Booster (PSB), the Proton Synchrotron (PS) or the Super Proton Synchrotron (SPS). [...]
Geneva : CERN, 2017 - 6 p. - Published in : (2017) , pp. 63-68 Fulltext: PDF;
In : 7th Evian Workshop on LHC beam operation, Evian Les Bains, France, 13 - 15 Dec 2016, pp.63-68

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2017-11-21
06:56
Turnaround - Analysis and possible Improvements / Fuchsberger, K (CERN)
This paper will present data of turnaround times during the previous run, give some insights in the distribution and try to spot different bottlenecks. The impact of the turnaround time on the optimal fill length will be shown and different contributing factors to the turnaround itself will be discussed. [...]
Geneva : CERN, 2017 - 8 p. - Published in : (2017) , pp. 33-40 Fulltext: PDF;
In : 7th Evian Workshop on LHC beam operation, Evian Les Bains, France, 13 - 15 Dec 2016, pp.33-40

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2017-11-21
06:55
LHC Injection / Bartmann, W (CERN) ; Barnes, M J (CERN) ; Bracco, C (CERN) ; Burkart, F (CERN) ; Carlier, E (CERN) ; Goddard, B (CERN) ; Kain, V (CERN) ; Meddahi, M (CERN) ; Steerenberg, R (CERN) ; Stoel, L (CERN) et al.
Losses at injection will be distinguished between the two main loss causes, transverse loss shower from the transfer line collimators and longitudinal loss shower due to satellites which are placed on the kicker field rise and thus improperly kicked into the machine. The dependence of this losses on the different beam types, TL stability and injec-tor performance will be reviewed. [...]
Geneva : CERN, 2017 - 4 p. - Published in : (2017) , pp. 29-32 Fulltext: PDF;
In : 7th Evian Workshop on LHC beam operation, Evian Les Bains, France, 13 - 15 Dec 2016, pp.29-32

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2017-11-21
06:55
Operation of a 6 BCHF collider: do we fit the expectations? / Bravin, E (CERN)
The way a complex machinery is operated has a direct impact on the production efficiency. In the case of the Large Hadron Collider (LHC), which required huge efforts to design and build, it is of the utmost importance to assure an adequate operation quality. [...]
Geneva : CERN, 2017 - 4 p. - Published in : (2017) , pp. 25-28 Fulltext: PDF;
In : 7th Evian Workshop on LHC beam operation, Evian Les Bains, France, 13 - 15 Dec 2016, pp.25-28

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2017-11-18
06:51
Cryogenic system configuration for the International Linear Collider (ILC) at mountainous site / Nakai, H (KEK, Tsukuba) ; Okamura, T (KEK, Tsukuba) ; Delikaris, D (CERN) ; Peterson, T (Fermilab) ; Yamamoto, A (KEK, Tsukuba)
The International Linear Collider (ILC) plans to make use of ten cryoplants for its main linacs, each providing 19 kW at 4.5 K equivalent and among of it 3.6 kW at 2 K. Each cryoplant will consist of various cryogenic components such as a 4.5 K refrigerator cold box, a 2 K refrigerator cold box, and helium compressors and so on. [...]
2017 - Published in : IOP Conf. Ser. Mater. Sci. Eng. 171 (2017) 012036 Fulltext: PDF;

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2017-11-18
06:51
Field Quality Measurements in the FNAL Twin-Aperture 11 T Dipole for LHC Upgrades / Strauss, T (Fermilab) ; Apollinari, G (Fermilab) ; Barzi, E (Fermilab) ; Chlachidze, G (Fermilab) ; Di Marco, J (Fermilab) ; Nobrega, F (Fermilab) ; Novitski, I (Fermilab) ; Stoynev, S (Fermilab) ; Turrioni, D (Fermilab) ; Velev, G (Fermilab) et al.
FNAL and CERN are developing an 11 T Nb3Sn dipole suitable for installation in the LHC to provide room for additional collimators. Two 1 m long collared coils previously tested at FNAL in single-aperture dipole configuration were assembled into the twin-aperture configuration and tested including magnet quench performance and field quality. [...]
FERMILAB-CONF-16-520-TD; NAPAC-2016-MOPOB41.- 2017 - 4 p. - Published in : 10.18429/JACoW-NAPAC2016-MOPOB41 Fulltext: PDF; External links: FERMILABCONF; JACoW

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