CERN Accelerating science

SPS and CNGS

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2017-12-04
12:41
Vacuum Simulations in High Energy Accelerators and Distribution Properties of Continuous and Discrete Particle Motions / Aichinger, Ida
The underlying thesis on mathematical simulation methods in application and theory is structured into three parts [...]
CERN-THESIS-2017-252 - 159 p.

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2017-12-01
06:39
Novel Ways of Heat Removal from Highly Irradiated Superconducting Windings in Accelerator Magnets / Bielert, Erwin R (Twente U., Enschede ; CERN) ; Verweij, Arjan P (Twente U., Enschede) ; ten Kate, Herman H J (Twente U., Enschede ; CERN)
Novel ideas of heat removal from superconducting windings in accelerator type magnets are investigated with the help of a recently developed and validated thermal model of a magnet cold mass implemented in COMSOL Multiphysics. Here the focus is on how to improve heat removal from the midplane of a superconducting quadrupole magnet, the area exposed to the highest radiation heat load [...]
2012 - 6 p. - Published in : Phys. Procedia 36 (2012) 818-823 Fulltext: PDF;

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2017-11-30
09:42
EM-Measurements and Evaluation of the XRP (Roman Pot to be installed with UA9 Experiment) / Farricker, Aaron (CERN) ; Popovic, Branko Kosta (CERN) ; Sunar, Ezgi ; Vollinger, Christine (CERN)
This Note discusses the EM-measurements and the impedance evaluation carried out on the XRP-experimental roman pot to complement the installation of the UA9 Experiment layout in the SPS for studies with a double-crystal setup (ECR SPS-TECS-EC-0001) implemented in 2017. [...]
CERN-ACC-NOTE-2017-0061.
- 2017. - 12 p.

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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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