accelerating-news-arc.web.cern.ch - luminosity

Third HiLumi Industry Day in the UK

Panagiotis Charitos — Mon, 03 Jul 2017 14:38:50 +0000

Third HiLumi Industry Day in the UK
by Isabel Bejar Alonso (CERN) and Panos Charitos (CERN)

Lucio Rossi, HL-LHC Project Coordinator, addresses participants at the HiLumi Industry Day (Image: CERN)

The cost of the upgrade, which will be realised within the regular CERN Budget, is estimated to close to 950 MCHF. The study phase of the upgrade started in 2010 and the commissioning phase will finish in 2026. The upgrade phase is crucial not only to be able to exploit fully the physics potential of the LHC, but also to continue to enable operation of the collider beyond 2025.

More than 1.2 km of the present LHC will be replaced, bringing with it new technical infrastructures - a challenge that can only be accomplished with the strong involvement of European industry. Since 2012, HiLumi, the HL-LHC upgrade project, has organized events to connect CERN with potential industrial partners able to handle the specific technical challenges of HL-LHC.

The third edition of the HiLumi Industry Day took place in Warrington, UK (close to Daresbury Laboratory) in May 2017. The two-day event jointly organised by CERN and STFC gathered some 200 participants from 17 European countries. Key engineers and physicists from CERN and STFC presented the technical challenges of the HL-LHC project to the numerous company delegates attending this event.

The face-to-face meetings arranged with the CERN engineers were also a nice opportunity for these companies to learn more about the key components of the HL-LHC upgrade and the upcoming calls for tender. The business to business meetings enhanced the creation of a community of industries wishing to work for large scientific infrastructures. In total, more than 1,000 face to face meetings were organized. The event finished with a visit to the STFC installations at Daresbury.

Industry will have a crucial role within the HL-LHC Project as the main provider of the technologies and the equipment that are required to successfully achieve the goals of this upgrade.

The HL-LHC project will collaborate with different types of industries and businesses to pursue its goals. Knowledge and technology to be developed during the HL-LHC project will make a lasting impact on society. These events allows scientific institutions to find the right industrial partners within our member states on schedule and for the best added value.

For the first time, ESS, ILL, ESO and SKA procurers also participated in the event, as it provided a great opportunity to discover new potential suppliers and to show the increasing global potential of the science market.

In 2018, HL-LHC will participate in the Big Science Business Forum 2018. In 2019 the event will be mainly focus to technical services.

More information on the event, including the technical presentations, are available on Indico event page, and more information on the HL-LHC industrial challenges can be found at the HL-LHC project website.

Tags:

HiLumi

HL-LHC

luminosity

industry

issue 21

Pile-up management at HL-LHC and Crab-Kissing

Margarita Synanidi — Thu, 20 Nov 2014 13:44:54 +0000

Pile-up management at HL-LHC and Crab-Kissing
by Stephane Fartoukh (CERN) with Agnes Szeberenyi (CERN)

Crab-kissing collision to level the luminosity and strongly mitigate the pile-up density at HL-LHC.
Image credit: S. Fartoukh (CERN)

The HiLumi LHC Design Study investigates novel technologies and concepts to extend the discovery potential of the LHC. The overall scheme targets an integrated luminosity higher by a factor of 10 with respect to the LHC, but without compromising on the quality of the data delivered, both in terms of total number of interactions per bunch crossing (pile-up), but also their line density along the luminous region. A novel collision scheme might lead the way to succeed.

This so-called crab-kissing scheme is complementary to the baseline crab-crossing scheme already in use. It assumes, however, that additional crab-cavities are installed in order to achieve a bunch rotation in the plane perpendicular to the crossing plane (the so-called parallel separation plane). In this way the two beams collide with a side-slip angle in one of the two transverse planes, for levelling the collision time and therefore the luminosity, while mitigating the interaction rate at the centre of the luminous region, and therefore spreading out the events more efficiently over the luminous region.

Assuming a double harmonic radio-frequency system for the HL-LHC, as already planned for other purposes, the longitudinal bunch distribution can be made more uniform. Then combined with the crab-kissing scheme, a pile up density of only 0.5-0.6 event /mm is within reach for the HL-LHC, which would definitely maximise the efficiency of the new detector and might even be partly used to further increase peak and integrated luminosity of the HL-LHC

The connection between pile-up density and crab-cavity via the crab-kissing scheme, gives an additional boost to this very challenging RF device which remains a keystone of the HL-LHC project. First beam dynamics analysis were reported at the 6th crab-cavity workshop CC13, validating the soundness of the proposal, in particular in terms of beam-beam effect.

Read more >>

Tags:

Upgrading together, HL-LHC and LIU

Sabrina El Yacoubi — Wed, 17 Sep 2014 13:56:16 +0000

Upgrading together, HL-LHC and LIU
by Kate Kahle (CERN)

The Linac4 accelerator tunnel. Linac4 is the first step of the LHC Injector Upgrade (LIU) project.
Image credit: CERN

On 30 March, participants from the High Luminosity LHC upgrade project (HL-LHC) and the LHC Injector Upgrade project (LIU) held a joint meeting aimed at converging on a set of achievable beam characteristics. After a welcome from Steve Myers, CERN Director of Accelerators and Technology, Mike Lamont gave a summary of the 1st combined meeting held in June 2011.

A talk by Verena Kain describing the transverse emittance blow-up and beam loss presently measured between injection and collision in the LHC itself. Oliver Bruning, deputy project coordinator of HL-LHC, then gave an update of the required beam characteristics at injection energy and Stephane Fartoukh spoke of a micro-batch filling scheme for pacman cancellations. HL-LHC talks concluded with new ideas from Frank Zimmermann including pile-up levelling versus luminosity levelling schemes and the potential gains and losses in performance.

LHC Injector Upgrade talks began with an analysis of the 2011 injector performance by Giovanni Rumolo, after which Brennan Goddard provided an update of achievable beam characteristics at injection. Roland Garoby, head of the LIU upgrade, commented on the means to bridge the gap between the HL-LHC requirements and the potential of the injectors.

In a question and answer session in the afternoon, discussions included the pros and cons of 25 and 50 nanosecond bunch spacing, and of overlapping LIU and LHC beam parameters. A summary will soon be linked to the agenda but for now all presentations are available online.

Read more >>

Tags:

Why do we need a High Luminosity LHC?

Sabrina El Yacoubi — Wed, 17 Sep 2014 13:49:27 +0000

Why do we need a High Luminosity LHC?
by Kate Kahle (CERN)

Work Packages of the HiLumi LHC FP7 Design Study (WP1-WP6) within the High-Luminosity (HL-LHC) project (click image to enlarge). Image credit: HiLumi LHC

The Large Hadron Collider (LHC) is set to remain the most powerful accelerator in the world for at least two decades. But beyond the run in 2019–2021, halving the statistical error in the measurements will require more than 10 years of running – unless the nominal luminosity is increased by a considerable amount.

To maintain scientific progress and exploit its full capacity, the LHC needs a major upgrade after 2020. The aim is to increase its luminosity by a factor of 5–10 beyond the original design value and provide 3000 fb–1 in 10 to 12 years.

From a physics perspective, operating at a higher luminosity has three main purposes: to perform more accurate measurements on the new particles discovered at the LHC; to observe rare processes that occur at rates below the current sensitivity, whether predicted by the Standard Model or by the new physics scenarios unveiled by the LHC; and to extend exploration of the energy frontier, to increase the discovery reach with rare events in which most of the proton momentum is concentrated in a single quark or gluon.

This has led to the High-Luminosity LHC (HL-LHC) project, which relies on innovative technologies such as cutting-edge 12 T superconducting magnets with large aperture, compact and ultraprecise superconducting cavities for beam rotation, new types of collimators and 300-m long, high-power superconducting links with almost zero energy dissipation. The most technically challenging aspects require CERN to form strong external collaborations, which is why part of the HL-LHC project is grouped under the FP7 HiLumi LHC Design Study. [Edited extract from the CERN Courier]

Read more >>

Tags: