CERN Accelerating science

BE Preprints

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2014-04-24
10:42
AD status and consolidation plans / Eriksson, T (CERN) ; Angoletta, M E (CERN) ; Arnaudon, L (CERN) ; Belochitskii, P (CERN) ; Bojtar, L (CERN) ; Calviani, M (CERN) ; Caspers, F (CERN) ; Federmann, S (CERN) ; Jørgensen, L (CERN) ; Louwerse, R (CERN) et al.
The CERN Antiproton Decelerator (AD) has now completed its 12th year of supplying low-energy antiproton beams for the successful physics program. Most of the machine’s key components are in operation since more than 25 years and prompted by the approval of the ELENA project, a substantial consolidation program is now being launched to ensure continued reliable operation. [...]
2013 - 4 p. Published version from JACoW: PDF;
In : International Workshop on Beam Cooling and Releated Topics, Mürren, Switzerland, 10 - 14 Jun 2013, pp.MOPM2HA02

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2014-04-11
09:28
Advances in the Understanding of the Physical Processes of Vacuum Breakdown / Wuensch, Walter (CERN)
Advances in the fundamental understanding of vacuum breakdown achieved during the program to develop high-gradient accelerating structures for a TeV-range linear collider project are described..
CERN-OPEN-2014-028 ; CLIC-Note-1025.
- 2013. - 18 p.
Preprint

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2014-03-14
16:06
Conceptual design of the post-PETS instrumentation line for CLIC / Olvegård, Maja (Uppsala U.) ; Ziemann, Volker (Uppsala U.)
We propose a method to measure the time-resolved momentum distribution and beam size at the end of the decelerator in the drive beam complex of the Compact Linear Collider, CLIC [...]
CERN-OPEN-2014-026 ; CLIC-Note-1024.
- 2013. - 13 p.
Preprint

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2013-12-11
14:45
Beam-loading Compensation Experiment in the CLIC Test Facility. Modelling and Simulation / Kononenko, Oleksiy (CERN ; SLAC) ; Corsini, Roberto (CERN) ; Grudiev, Alexej (CERN) ; Tecker, Frank (CERN)
Transient beam-loading in the main linac is an important performance issue for a Compact Linear Collider (CLIC) study [...]
CERN-OPEN-2013-039 ; CLIC-Note-987.
- 2013. - 15 p.
Preprint

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2013-12-04
17:57
The ELENA Electron Cooler: Parameter choice and expected performance / Tranquille, G ; Frassier, A ; Joergensen, L
Electron cooling will be central to the success of the ELENA project which aims to increase by a factor of up to 100 the number of antiprotons available for the trap experiments. [...]
CERN-BE-2013-004.
- 2013. - 3 p.
Full text

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2013-11-07
12:12
RF-Breakdown kicks at the CTF3 two-beam test stand / Palaia, Andrea (CERN) ; Jacewicz, Marek (CERN) ; Muranaka, Tomoko (CERN) ; Ruber, Roger (CERN) ; Ziemann, V (Uppsala U.) ; Farabolini, W (IRFU, Saclay)
The measurement of the effects of RF-breakdown on the beam in CLIC prototype accelerator structures is one of the key aspects of the CLIC two-beam acceleration scheme being addressed at the Two-beam Test Stand (TBTS) at CTF3. RF-breakdown can randomly cause energy loss and transverse kicks to the beam [...]
CERN-OPEN-2013-038; CLIC-Note-983.- Geneva : CERN, 2012 - 4 p. Preprint: PDF; Published version from JaCoW: PDF;
In : 3rd International Particle Accelerator Conference 2012, New Orleans, LA, USA, 20 - 25 May 2012, pp.73

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2013-10-29
10:34
Two-Beam Linear Colliders - Special Issues / Corsini, Roberto (CERN)
The path towards a multi-TeV e+e- linear collider proposed by the CLIC study is based on the Two-Beam Acceleration (TBA) scheme. Such a scheme is promising in term of efficiency, reliability and cost. [...]
CERN-OPEN-2013-036; CLIC-Note-798.- Geneva : CERN, 2010 - 6 p. Published version fron PAC'09: PDF;
In : Particle Accelerator Conference 2009, Vancouver, Canada, 04 - 08 May 2009, pp.TH3GBI01

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2013-10-28
17:36
Quantitative Outgassing studies in DC Electrical breakdown / Levinsen, Yngve Inntjore (Oslo U. ; CERN) ; Descoeudres, A (CERN) ; Calatroni, Sergio (CERN) ; Taborelli, Mauro (CERN) ; Wünsch, Walter (CERN)
Breakdown in the accelerating structures sets an important limit to the performance of the CLIC linear collider. Vacuum degradation and subsequent beam instability are possible outcomes of a breakdown if too much gas is released from the cavity surface. [...]
CERN-OPEN-2013-035; CLIC-Note-797.- Geneva : CERN, 2010 - 4 p. Published version from PAC'09: PDF;
In : Particle Accelerator Conference 2009, Vancouver, Canada, 04 - 08 May 2009, pp.TU5PFP013

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2013-10-28
16:46
Results from the CLIC X-BAND structure test program at the NLCTA / Adolphsen, Chris (SLAC) ; Bowden, Gordon (SLAC) ; Dolgashev, Valery (SLAC) ; Laurent, Lisa (SLAC) ; Tantawi, Sami (SLAC) ; Wang, Faya (SLAC) ; Wang, W Juwen (SLAC) ; Doebert, Steffen (CERN) ; Grudiev, Alexej (CERN) ; Riddone, Germana (CERN) et al.
As part of a SLAC-CERN-KEK col­lab­o­ra­tion on high gra­di­ent X-band struc­ture re­search, sev­er­al pro­to­type struc­tures for the CLIC lin­ear col­lid­er study have been test­ed using two of the high power (300 MW) X-band rf sta­tions in the NLCTA fa­cil­i­ty at SLAC. These struc­tures dif­fer in terms of their man­u­fac­tur­ing (brazed disks and clamped quad­rants), gra­di­ent pro­file (amount by which the gra­di­ent in­creas­es along the struc­ture which op­ti­mizes ef­fi­cien­cy and max­i­mizes sus­tain­able gra­di­ent) and HOM damp­ing (use of slots or waveg­uides to rapid­ly dis­si­pate dipole mode en­er­gy). [...]
CERN-OPEN-2013-033; SLAC-PUB-13697; CLIC-Note-799.- Geneva : CERN, 2010 - 4 p. Preprint: PDF; External link: Published version from PAC09
In : Particle Accelerator Conference 2009, Vancouver, Canada, 04 - 08 May 2009, pp.WE5PFP018

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2013-10-25
17:07
LHC and CLIC LLRF final reports / Dexter, A (ULAN-CI) ; Burt, G (ULAN-CI) ; Woolley, B (ULAN-CI) ; Ambattu, P (ULAN-CI) ; Tahir, I (ULAN-CI) ; Syratchev, Igor (CERN) ; Wuensch, Walter (CERN)
Crab cavities rotate bunches from opposing beams to achieve effective head-on collision in CLIC or collisions at an adjustable angle in LHC [...]
CERN-OPEN-2013-032 ; CLIC-Note-994.
- 2013. - 85 p.
Preprint

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