Commissioning of the LHC Beam Transfer Line TI 8

Uythoven, Jan; Arduini, G.; Goddard, B.; Jacquet, Delphine; Kain, V.; Lamont, Mike; Mertens, Volker; Spinks, Alan; Wenninger, J.; Chao, Yu‐Chiu

doi:10.1109/pac.2005.1590798

Cited by 8 publications

(10 citation statements)

References 6 publications

(13 reference statements)

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“…So far, it has delivered an outstanding luminosity -beyond expectations-in spite of its current limited energy (see e.g. [1]). In a few months, the LHC will be shut down for about two years in order to prepare it for an increase in the collision energy close to the design one, i.e.…”

Section: Introductionmentioning

confidence: 99%

Prospective for A Fixed-Target ExpeRiment at the LHC: AFTER @ LHC

Lansberg¹,

Chambert²,

Didelez³

et al. 2013

Proceedings of 36th International Conference on High Energy Physics — PoS(ICHEP2012)

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We argue that the concept of a multi-purpose fixed-target experiment with the proton or leadion LHC beams extracted by a bent crystal would offer a number of ground-breaking precisionphysics opportunities. The multi-TeV LHC beams will allow for the most energetic fixed-target experiments ever performed. The fixed-target mode has the advantage of allowing for high luminosities, spin measurements with a polarised target, and access over the full backward rapidity domain -uncharted until now-up to x F ≃ −1.

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Section: Introductionmentioning

confidence: 99%

Prospective for A Fixed-Target ExpeRiment at the LHC: AFTER @ LHC

Lansberg¹,

Chambert²,

Didelez³

et al. 2013

Proceedings of 36th International Conference on High Energy Physics — PoS(ICHEP2012)

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“…The proposed method was tested during three hours of the TI 8 commissioning which took place in 2004 [5]. The goal of this first test of the alignment method was a qualitative check of the method.…”

Section: Test Of the Methods During Ti 8 Beam Commissioningmentioning

confidence: 99%

Beam Based Alignment of the LHC Transfer Line Collimators

Kain

Burkhardt²,

Goddard³

et al.

Proceedings of the 2005 Particle Accelerator Conference

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Beam based Alignment of the LHC Transfer Line CollimatorsAt LHC injection energy the aperture available in the transfer lines and in the LHC is small and the intensities of the injected beams are an order of magnitude above the damage level. The setting of protection elements such as the transfer line collimators is therefore very critical; mechanical and optical tolerances must be taken into account to define the nominal setting. Being able to measure and control the collinearity of the collimator jaws with the beam relaxes the requirement on the settings considerably. A method to measure angular misalignment of the collimator jaws in the transfer line based on a transmission measurement is discussed. AbstractAt LHC injection energy the aperture available in the transfer lines and in the LHC is small and the intensities of the injected beams are an order of magnitude above the damage level. The setting of protection elements such as the transfer line collimators is therefore very critical; mechanical and optical tolerances must be taken into account to define the nominal setting. Being able to measure and control the collinearity of the collimator jaws with the beam relaxes the requirement on the settings considerably. A method to measure angular misalignment of the collimator jaws in the transfer line based on a transmission measurement is discussed. Simulations have been made and a test of principle has been carried out during the 2004 commissioning of the transfer line TI 8.

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“…After the implementation of the modifications described above the kicker system was re-commissioned in spring 2004 and used during periods of CNGS low intensity extraction, the commissioning of the new LHC transfer line TI 8 and the LHC collimator tests [5][6][7]. The kick field was measured with capacitive pick-ups (permitting a kick measurement in the SPS) and an inductive probe (as a field calibration reference, not useable in the SPS Step 2" after adding magnet damping resistors (laboratory result), "…”

Section: Re-commissioning and Kicker Measurementsmentioning

confidence: 99%

Performance of the CERN SPS Fast Extraction for the CNGS Facility

Gaxiola

Arduini²,

Höfle³

et al.

Proceedings of the 2005 Particle Accelerator Conference

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The SPS LSS4 fast extraction system will serve both the anti-clockwise ring of the LHC and the long baseline neutrino (CNGS) facility. For the latter two extractions spaced by 50 ms, each affecting half of the SPS, are foreseen. During the shutdown 2003-2004 the performance of the fast extraction kickers has been improved in order to match more closely the specifications required for the CNGS and LHC extractions. The kick rise and fall times were significantly reduced, as well as the post-pulse kick ripple. However, the latter remained outside specifications and oscillations were induced in the leading bunches of the batch remaining in the machine at the moment of the first extraction. While further improving the kicker pulse shape, the possibility of damping the beam oscillations using the transverse feedback system has been explored. Recent pulse improvements and results of beam tests are reported. EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH CERN -AB Department PERFORMANCE OF THE CERN SPS FAST EXTRACTION FOR THE CNGS FACILITYE. Gaxiola, G. Arduini, W. Höfle, F. Roncarolo, E. Vogel, E.Vossenberg CERN, Geneva, Switzerland AbstractThe SPS LSS4 fast extraction system will serve both the anti-clockwise ring of the LHC and the long baseline neutrino (CNGS) facility. For the latter two extractions spaced by 50 ms, each affecting half of the SPS, are foreseen. During the shutdown 2003-2004 the performance of the fast extraction kickers has been improved in order to match more closely the specifications required for the CNGS and LHC extractions. The kick rise and fall times were significantly reduced, as well as the post-pulse kick ripple. However, the latter remained outside specifications and oscillations were induced in the leading bunches of the batch remaining in the machine at the moment of the first extraction. While further improving the kicker pulse shape, the possibility of damping the beam oscillations using the transverse feedback system has been explored. Recent pulse improvements and results of beam tests are reported.

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Commissioning of the LHC Beam Transfer Line TI 8

Cited by 8 publications

References 6 publications

Prospective for A Fixed-Target ExpeRiment at the LHC: AFTER @ LHC

Prospective for A Fixed-Target ExpeRiment at the LHC: AFTER @ LHC

Beam Based Alignment of the LHC Transfer Line Collimators

Performance of the CERN SPS Fast Extraction for the CNGS Facility

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