CERN Accelerating science

Projects, Upgrade and Consolidation Projects

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2015-01-22
11:01
Crossing scheme and orbit correction in IR1/5 for HL-LHC / Fitterer, M ; Fartoukh, S ; Giovannozzi, M ; De Maria, R
In this paper we review the orbit correction strategy and crossing scheme adjustment for the HL-LHC orbit correctors in IR1/5 in view of the new optics and layout version HLLHCV1.1. [...]
CERN-ACC-2015-0014.
- 2015. - 48 p.

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2015-01-21
09:10
A charge-pump 60kV modulator for the ISOLDE target extraction voltage / Barlow, R A (CERN, Switzerland) ; Bleus, B (CERN, Switzerland) ; Fowler, A (CERN, Switzerland) ; Gaudillet, H (CERN, Switzerland) ; Gharsa, T (CERN, Switzerland) ; Schipper, J (CERN, Switzerland)
The ISOLDE facility at CERN provides radioactive ion beams to a number of experimental stations. [...]
CERN-ACC-2015-0013.
- 2015. - 6 p.
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2015-01-20
17:15
Changes to the LHC Beam Dumping System for LHC Run 2 / Uythoven, J (CERN, Switzerland) ; Atanasov, MG (CERN, Switzerland) ; Borburgh, J (CERN, Switzerland) ; Carlier, E (CERN, Switzerland) ; Gabourin, S (CERN, Switzerland) ; Goddard, B (CERN, Switzerland) ; Magnin, N (CERN, Switzerland) ; Senaj, V (CERN, Switzerland) ; Voumard, N (CERN, Switzerland) ; Weterings, W (CERN, Switzerland)
The LHC beam dumping system performed according to expectations during Run 1 of the LHC (2009 – 2013). A brief overview of the experience is given, including a summary of the observed performance by comparison to expectations. [...]
CERN-ACC-2015-0011.- Geneva : CERN, 2015 - 5 p. Fulltext: PDF;
In : 5th International Particle Accelerator Conference, Dresden, Germany, 15 - 20 Jun 2014, pp.IPAC

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2015-01-20
17:10
Upgrades to the LHC Injection and Beam Dumping Systems for the HL-LHC Project / Uythoven, J (CERN, Switzerland) ; Barnes, MJ (CERN, Switzerland) ; Goddard, B (CERN, Switzerland) ; Hrivnak, J (CERN, Switzerland) ; Lechner, A (CERN, Switzerland) ; Maciariello, FL (CERN, Switzerland) ; Mereghetti, A (CERN, Switzerland) ; Perillo Marcone, A (CERN, Switzerland) ; Vittal Shetty, N (CERN, Switzerland) ; Steele, GE (CERN, Switzerland)
The HL-LHC project will push the performance of the LHC injection and beam dumping systems towards new limits. This paper describes the systems affected and presents the new beam parameters for these systems. [...]
CERN-ACC-2015-0010.- Geneva : CERN, 2015 - 3 p. Fulltext: PDF;
In : 5th International Particle Accelerator Conference, Dresden, Germany, 15 - 20 Jun 2014, pp.IPAC

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2015-01-07
10:34
The Electrical Resistance of Rutherford-Type Superconducting Cable Splices / Heck, C (CERN, Switzerland) ; Scheuerlein, Chr (CERN, Switzerland) ; Fleiter, J (CERN, Switzerland) ; Bottura, L (CERN, Switzerland)
The electrical resistance of Large Hadron Collider main busbar cable lap splices produced by soft soldering has been measured with two independent methods as a function of intercable contact area and for splices made of cables with various defects. For defect-free lap splices, the resistance increases from 0.3 to 10 nΩ (at 4.3 K in self-field) when reducing the cable overlap length from 120 to 3 mm, as expected assuming that the resistance is inversely proportional to the intercable contact area. [...]
CERN-ACC-2015-0003.- Geneva : CERN, 2015 - 5 p. Fulltext: PDF;
In : Applied Superconductivity Conference 2014, Charlotte, NC, USA, 10 - 15 Aug 2014, pp.ASC 2014

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2014-12-17
14:03
The Control System of CERN Accelerators Vacuum (LS1 Activities and New Developments) / Gomes, P (CERN, Switzerland) ; Antoniotti, F (CERN, Switzerland) ; Bellorini, F (CERN, Switzerland) ; Blanchard, S (CERN, Switzerland) ; Boivin, JP (CERN, Switzerland) ; Gama, J (CERN, Switzerland) ; Girardot, G (CERN, Switzerland) ; Pigny, G (CERN, Switzerland) ; Rio, B (CERN, Switzerland) ; Vestergard, H (CERN, Switzerland) et al.
After 3 years of operation, the LHC entered its first Long Shutdown period (LS1), in February 2013 [1]. Major consolidation and maintenance works are being performed across the whole CERN’s Accelerator chain, in order to prepare the LHC to restart at higher energy, in 2015. [...]
CERN-ACC-2014-0352.- Geneva : CERN, 2014 - 5 p. Fulltext: PDF;
In : 14th International Conference on Accelerator & Large Experimental Physics Control Systems, San Francisco, CA, USA, 6 - 11 Oct 2013, pp.ICALEPS

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2014-12-17
13:51
Validation of the Data Consolidation in Layout Database for the LHC Tunnel Cryogenics Controls Upgrade / Tovar-Gonzalez, A (CERN, Switzerland) ; Balle, C (CERN, Switzerland) ; Blanco, E (CERN, Switzerland) ; Fortescue-Beck, E (CERN, Switzerland) ; Fluder, C (CERN, Switzerland) ; Inglese, V (CERN, Switzerland) ; Pezzetti, M (CERN, Switzerland) ; Gomes, P (CERN, Switzerland) ; Wolak, T (CERN, Switzerland) ; Dudek, M (CERN, Switzerland) et al.
The control system of the Large Hadron Collider cryogenics manages over 34’000 instrumentation and actuator channels. The complete information on their characteristics and parameters can be extracted from a set of views on the Layout database, to generate the specifications of the control system; from these, the code to populate PLCs (Programmable Logic Controller) and SCADA (Supervisory Control & Data Acquisition) is automatically produced, within the UNICOS framework (Unified Industrial Control System). [...]
CERN-ACC-2014-0348.- Geneva : CERN, 2014 - 5 p. Fulltext: PDF;
In : 14th International Conference on Accelerator & Large Experimental Physics Control Systems, San Francisco, CA, USA, 6 - 11 Oct 2013, pp.ICALEPS

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2014-12-16
16:04
Mitigation of Radiation and EMI Effects on the Vacuum Control System of LHC / Pigny, G (CERN, Switzerland) ; Gomes, P (CERN, Switzerland) ; Rio, B (CERN, Switzerland) ; Krakowski, P (AGH, Cracow, Poland)
The 26 km of vacuum chambers where circulates the beam of the Large Hadron Collider (LHC) must be maintained under Ultra High Vacuum (UHV) to minimize the beam interactions with residual gases, and allow the operation of specific systems. The vacuum level is measured by several thousands of gauges along the accelerator. [...]
CERN-ACC-2014-0339.- Geneva : CERN, 2014 - 10 p. Fulltext: PDF;
In : Topical Workshop on Electronics for Particle Physics, Perugia, Italy, 23 - 27 Sep 2013, pp.twepp

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2014-12-16
15:07
Radiation Tolerant Programmable Power Supply for the LHC Beam Screen Heaters / Casas, J (CERN, Switzerland) ; Trikoupis, N (CERN, Switzerland)
For the next LHC run, it is required to install 200W of heating capacity per LHC beam screen heater to regenerate the beam screen by desorption of gas trapped on its walls. In the LHC, there are 272 beam screen heaters and the associated electronics limit presently the heating capacity to 25W. [...]
CERN-ACC-2014-0338.- Geneva : CERN, 2014 - 12 p. Fulltext: PDF;
In : Topical Workshop on Electronics for Particle Physics, Perugia, Italy, 23 - 27 Sep 2013, pp.twepp

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2014-12-15
16:22
LHC Injectors Upgrade, Technical Design Report, Vol. I: Protons / Coupard, J ; Damerau, H ; Funken, A ; Garoby, R ; Gilardoni, S ; Goddard, B ; Hanke, K ; Lombardi, A ; Manglunki, D ; Meddahi, M et al.
n/a
CERN-ACC-2014-0337.
- 2014. - 616 p.
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