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1.
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Protection of Hardware: Powering Systems (Power Converter, Normal Conducting, and Superconducting Magnets)
/ Pfeffer, H. (Fermilab) ; Flora, B. (Fermilab) ; Wolff, D. (Fermilab)
Along with the protection of magnets and power converters, we have added a section on personnel protection because this is our highest priority in the design and operation of power systems. Thus, our topics are the protection of people, power converters, and magnet loads (protected from the powering equipment), including normal conducting magnets and superconducting magnets..
arXiv:1608.03092; FERMILAB-CONF-14-596-AD.-
2016 - 18 p.
- Published in : CERN Yellow Report CERN-2016-002, pp.343-360
Fulltext: PDF; External link: Fermilab Library Server (fulltext available)
In : 2014 Joint International Accelerator School: Beam Loss and Accelerator Protection, pp.343-360
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2.
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Qualification of the Bypass Continuity of the Main Dipole Magnet Circuits of the LHC
/ Rowan, Scott (CERN) ; Auchmann, Bernhard (CERN) ; Brodzinski, Krzysztof (CERN) ; Charifoulline, Zinour (CERN) ; Panev, Bozhidar Ivanov (CERN) ; Pfeffer, Howard (Fermilab) ; Rodriguez-Mateos, Felix (CERN) ; Romera, Iván (CERN) ; Schmidt, Ruediger (CERN) ; Siemko, Andrzej (CERN) et al.
The copper-stabilizer continuity measurement (CSCM) was devised in order to attain complete electrical qualification of all busbar joints, lyres, and the magnet bypass connections in the 13~kA circuits of the LHC. A CSCM is carried out at 20 K, i.e., just above the critical temperature, with resistive magnets. [...]
CERN-ACC-2015-232.-
2015 - 4 p.
- Published in : 10.18429/JACoW-IPAC2015-WEPHA017
Published version from JACoW: PDF; External link: JACOW
In : 6th International Particle Accelerator Conference, Richmond, VA, USA, 3 - 8 May 2015, pp.WEPHA017
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3.
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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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4.
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Production and Quality Assurance of Main Busbar Interconnection Splices during the LHC 2008-2009 Shutdown.
/ Bertinelli, F (CERN) ; Bottura, L (CERN) ; Dalin, J-M (CERN) ; Fessia, P (CERN) ; Flora, R H (Fermilab) ; Heck, S (CERN) ; Pfeffer, H (Fermilab) ; Prin, H (CERN) ; Scheuerlein, C (CERN) ; Thonet, P (CERN) et al.
The main busbar interconnection splices of the Large Hadron Collider are assembled by inductive soldering of the Rutherford type cables and the copper profiles of the stabilizer. Following the September 2008 incident, the assembly process and the quality assurance have been improved, with new measurement and diagnostics methods introduced. [...]
CERN-ATS-2011-069.-
Geneva : CERN, 2011 - 6 p.
- Published in : IEEE Trans. Appl. Supercond. 21 (2011) 1786-1790
Fulltext: PDF; IEEE Published version, local copy: PDF;
In : Applied Superconductivity Conference 2010, Washington, DC, USA, 1 - 6 Aug 2010
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5.
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Measurements of the Resistance of Main Circuit Busbar Segments at the LHC at Warm
/ Koratzinos, M (CERN) ; Bertinelli, F (CERN) ; Flora, R H (Fermilab) ; Pfeffer, H (Fermilab) ; Scheuerlein, C (CERN) ; Siemko, A (CERN) ; Strait, J (Fermilab)
Following the QPS review in February 2009, a potential source of problems with the main circuit bus bar splices was identified: discontinuity in the copper stabilizer, coupled with lack of contact of the superconducting cable to the copper, in the vicinity of a splice [...]
CERN-ATS-2010-200.
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2010. - 57 p.
Full text
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6.
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High-Current Bus Splice Resistances and Implications for the Operating Energy of the LHC
/ Koratzinos, M (CERN) ; Bertinelli, F (CERN) ; Charifoulline, Z (CERN) ; Dahlerup-Petersen, K (CERN) ; Denz, R (CERN) ; Flora, R H (Fermilab) ; Pfeffer, H (Fermilab) ; Scheuerlein, C (CERN) ; Schmidt, R (CERN) ; Siemko, A (CERN) et al.
At each interconnection between LHC main magnets a low-resistance solder joint must be made between superconducting cables in order to provide a continuous current path through the superconductor and also to the surrounding copper stabilizer in case the cable quenches [1]. About 10,000 such joints exist in the LHC. [...]
CERN-ATS-2010-175.-
Geneva : CERN, 2010 - 4 p.
Fulltext: PDF; External link: Published version from JACoW
In : 1st International Particle Accelerator Conference, Kyoto, Japan, 23 - 28 May 2010, pp.MOPEB044
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7.
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Upgrade of the Quench Protection Systems for the Superconducting Circuits of the LHC Machine at CERN: From Concept and Design to the First Operational Experience
/ Formenti, F (CERN) ; Charifoulline, Z (CERN) ; Coelingh, G J (CERN) ; Dahlerup-Petersen, K (CERN) ; Denz, R (CERN) ; Honma, A (CERN) ; Ravaioli, E (CERN) ; Schmidt, R (CERN) ; Siemko, A (CERN) ; Steckert, J (CERN) et al.
Two events, occurring in 2008 during commissioning of the LHC circuits, lead to fundamental changes to the scope of circuit protection. The discovery of aperturesymmetric quenches and the accidental rupture at 9 kA of an interconnecting busbar resulted in an emergency program for development and implementation of new protection facilities. [...]
CERN-ATS-2010-129.-
Geneva : CERN, 2010 - 4 p.
Fulltext: PDF; External link: Published version from JACoW
In : 1st International Particle Accelerator Conference, Kyoto, Japan, 23 - 28 May 2010, pp.MOPD013
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8.
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ILC Reference Design Report Volume 3 - Accelerator
/ Phinney, Nan (ed.) (SLAC) ; Toge, Nobukazu (ed.) (KEK, Tsukuba) ; Walker, Nicholas J. (ed.) (DESY) ; Aarons, Gerald (SLAC) ; Abe, Toshinori (Tokyo U.) ; Abernathy, Jason (Victoria U.) ; Ablikim, Medina (Beijing, Inst. High Energy Phys.) ; Abramowicz, Halina (Tel Aviv U.) ; Adey, David (Birmingham U.) ; Adloff, Catherine (Annecy, LAPP) et al.
The International Linear Collider (ILC) is a 200-500 GeV center-of-mass high-luminosity linear electron-positron collider, based on 1.3 GHz superconducting radio-frequency (SCRF) accelerating cavities. [...]
arXiv:0712.2361 ; FERMILAB-PUB-07-833-AD.
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2007 - 339.
Fermilab Library Server - Full text - Fulltext
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