CERN Accelerating science

ATS Reports

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2014-11-12
14:52
Quench Protection Studies of 11T 2-in-1 Nb3Sn Dipole Models for LHC Upgrades / Zlobin, AV (Fermilab) ; Chlachidze, G (Fermilab) ; Nobrega, F (Fermilab) ; Novitski, I (Fermilab) ; Karppinen, M (CERN)
CERN and FNAL are developing 11 T Nb3Sn dipole magnets for the LHC collimation system upgrade. Due to the large stored energy, protection of these magnets during a quench is a challenging problem. [...]
CERN-ACC-2014-0286.- Geneva : CERN, 2014 - 4 p. Fulltext: PDF; External link: Published version from JaCoW
In : 5th International Particle Accelerator Conference, Dresden, Germany, 15 - 20 Jun 2014, pp.2725

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2014-11-12
14:49
Status of 11T 2-in-1 Nb3Sn Dipole Development for LHC / Zlobin, AV (Fermilab) ; Andreev, N (Fermilab) ; Apollinari, G (Fermilab) ; Barzi, E (Fermilab) ; Bossert, R (Fermilab) ; Buehler, M (Fermilab) ; Chlachidze, G (Fermilab) ; DiMarco, J (Fermilab) ; Nobrega, A (Fermilab) ; Novitski, I (Fermilab) et al.
The LHC upgrade plans foresee installation of additional collimators in the LHC lattice. To provide the necessary longitudinal space for these collimators, shorter and stronger Nb3Sn dipoles compatible with the LHC lattice and main systems could be used. [...]
CERN-ACC-2014-0285.- Geneva : CERN, 2014 - 4 p. Fulltext: PDF; External link: Published version from JaCoW
In : 5th International Particle Accelerator Conference, Dresden, Germany, 15 - 20 Jun 2014, pp.2722

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2014-11-12
11:04
Collider Beam Physics / Zimmermann, F (CERN)
We review some accelerator physics topics for circular as well as linear colliders, considering both lepton and hadron beams
CERN-ACC-2014-0284.
- 2014. - 39 p.
Full text

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2014-11-12
10:55
MadX Tracking Simulations to Determine the Beam Loss Distributions for the LHC Quench Tests with ADT Excitation / Chetvertkova, V (CERN) ; Auchmann, B (CERN) ; Baer, T (CERN) ; Höfle, W (CERN) ; Priebe, A (CERN) ; Sapinski, M (CERN) ; Schmidt, R (CERN) ; Verweij, A (CERN) ; Wollmann, D (CERN)
Quench tests with stored beam were performed in 2013 with one of the LHC main focusing quadrupoles to experimentally verify the quench levels for beam losses in the time scales from a few milliseconds to several seconds. A novel technique combining a 3-corrector orbit bump and transverse-damper kicks was used for inducing the beam losses. [...]
CERN-ACC-2014-0283.- Geneva : CERN, 2014 - 5 p. Fulltext: PDF; External link: Published version from JaCoW
In : 5th International Particle Accelerator Conference, Dresden, Germany, 15 - 20 Jun 2014, pp.3991

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2014-11-12
10:52
CSCM: Experimental and Simulation Results / Rowan, S (CERN) ; Auchmann, B (CERN) ; Brodzinski, K (CERN) ; Charifoulline, Z (CERN) ; Denz, R (CERN) ; Romera, I (CERN) ; Roger, V (CERN) ; Siemko, A (CERN) ; Schmidt, R (CERN) ; Steckert, J (CERN) et al.
The Copper-Stabilizer Continuity Measurement (CSCM) was devised to obtain a direct and complete qualification of the continuity in the 13 kA bypass circuits of the LHC, especially in the copper-stabilizer of the busbar joints and the bolted connections in the diodeleads, as well as in lyra connections. The circuit under test is brought to about 20 K, a voltage is applied to open the diodes by-passing the magnets, and the low-inductance circuit is powered according to a pre-defined series of current profiles. [...]
CERN-ACC-2014-0282.- Geneva : CERN, 2014 - 4 p. Fulltext: PDF; External link: Published version from JaCoW
In : 5th International Particle Accelerator Conference, Dresden, Germany, 15 - 20 Jun 2014, pp.3988

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2014-11-12
10:50
Implementation of a Direct Link between the LHC Beam Interlock System and the LHC Beam Dumping System Re-Triggering Lines / Gabourin, S (CERN) ; Carlier, E (CERN) ; Denz, R (CERN) ; Magnin, N (CERN) ; Uythoven, J (CERN) ; Wollmann, D (CERN) ; Zerlauth, M (CERN) ; Vatansever, V (University of Stuttgart, Germany) ; Bartholdt, M (University of Stuttgart, Germany) ; Bertsche, B (University of Stuttgart, Germany) et al.
To avoid damage of accelerator equipment due to impacting beam, the controlled removal of the LHC beams from the collider rings towards the dump blocks must be guaranteed at all times. When a beam dump is demanded, the Beam Interlock System communicates this request to the Trigger Synchronisation and Distribution System of the LHC Beam Dumping System. [...]
CERN-ACC-2014-0281.- Geneva : CERN, 2014 - 4 p. Fulltext: PDF; External link: Published version from JaCoW
In : 5th International Particle Accelerator Conference, Dresden, Germany, 15 - 20 Jun 2014, pp.3810

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2014-11-12
10:47
Machine Protection Challenges for HL-LHC / Schmidt, R (CERN) ; Bär, T (CERN) ; Wenninger, J (CERN) ; Wollmann, D (CERN) ; Zerlauth, M (CERN)
LHC operation requires the flawless functioning of the machine protection systems. The energy stored in the beam was progressively increased beyond the 140 MJ range at the end of 2012 at 4 TeV/c. [...]
CERN-ACC-2014-0280.- Geneva : CERN, 2014 - 5 p. Fulltext: PDF; External link: Published version from JaCoW
In : 5th International Particle Accelerator Conference, Dresden, Germany, 15 - 20 Jun 2014, pp.1039

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2014-11-12
10:43
Supervision Software for the Integration of the Beam Interlock System with the CERN Accelerator Complex / Audrain, M (CERN) ; Anderson, D (CERN) ; Dragu, M (CERN) ; Fuchsberger, K (CERN) ; Garnier, JC (CERN) ; Gorzawski, AA (CERN) ; Koza, M (CERN) ; Krol, K (CERN) ; Moscatelli, A (CERN) ; Puccio, B (CERN) et al.
The Accelerator complex at the European Organisation for Nuclear Research (CERN) is composed of many systems which are required to function in a valid state to ensure safe beam operation. One key component of machine protection, the Beam Interlock System (BIS), was designed to interface critical systems around the accelerator chain, provide fast and reliable transmission of beam dump requests and trigger beam extraction in case of malfunctioning of equipment systems or beam losses. [...]
CERN-ACC-2014-0279.- Geneva : CERN, 2014 - 4 p. Fulltext: PDF; External link: Published version from JaCoW
In : 5th International Particle Accelerator Conference, Dresden, Germany, 15 - 20 Jun 2014, pp.476

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2014-11-12
10:41
Reliable Software Development for Machine Protection Systems / Anderson, D (CERN) ; Audrain, M (CERN) ; Dragu, M (CERN) ; Fuchsberger, K (CERN) ; Garnier, JC (CERN) ; Gorzawski, AA (CERN) ; Koza, M (CERN) ; Krol, K (CERN) ; Misiowiec, K (CERN) ; Stamos, K (CERN) et al.
The Controls software for the Large Hadron Collider (LHC) at CERN, with more than 150 millions lines of code, resides amongst the largest known code bases in the world1. Industry has been applying Agile software engineering techniques for more than two decades now, and the advantages of these techniques can no longer be ignored to manage the code base for large projects within the accelerator community. [...]
CERN-ACC-2014-0278.- Geneva : CERN, 2014 - 4 p. Fulltext: PDF; External link: Published version from JaCoW
In : 5th International Particle Accelerator Conference, Dresden, Germany, 15 - 20 Jun 2014, pp.489

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2014-11-12
10:38
Testing Quality and Metrics for the LHC Magnet Powering System throughout Past and Future Commissioning / Anderson, D (CERN) ; Audrain, M (CERN) ; Charifoulline, Z (CERN) ; Dragu, M (CERN) ; Fuchsberger, K (CERN) ; Garnier, JC (CERN) ; Gorzawski, AA (CERN) ; Koza, M (CERN) ; Krol, K (CERN) ; Rowan, S (CERN) et al.
The LHC magnet powering system is composed of thousands of individual components to assure a safe operation when operating with stored energies as high as 10GJ in the superconducting LHC magnets. Each of these components has to be thoroughly commissioned following interventions and machine shutdown periods to assure their protection function in case of powering failures. [...]
CERN-ACC-2014-0277.- Geneva : CERN, 2014 - 4 p. Fulltext: PDF; External link: Published version from JaCoW
In : 5th International Particle Accelerator Conference, Dresden, Germany, 15 - 20 Jun 2014, pp.3995

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