English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Beam Intercepting Devices (BIDs) are essential protection elements for theoperation of the Large Hadron Collider (LHC) complex. The LHC internal beamdump (LHC Target Dump Injection or LHC TDI) is the main protection BID of theLHC injection system; its main function is to protect LHC equipment in theevent of a malfunction of the injection kicker magnets during beam transferfrom the SPS to the LHC. Several issues with the TDI were encountered duringLHC operation, most of them due to outgassing from its core components inducedby electron cloud effects, which led to limitations of the injector intensityand hence had an impact on LHC availability. The absorbing cores of the TDIs,and of beam intercepting devices in general, need to deal with highthermo-mechanical loads induced by the high intensity particle beams. Inaddition, devices such as the TDI - where the absorbing materials are installedclose to the beam, are important contributors to the accelerator impedancebudget. To reduce impedance, the absorbing materials that make up the core mustbe typically coated with high electrical conductivity metals. Beam impacttesting of the coated absorbers is a crucial element of development work toensure their correct operation. The behaviour of several metal-coated absorbermaterials was investigated when exposed to high intensity and high energyproton beams in the HiRadMat facility at CERN. Different coating configurationsbased on copper and molybdenum, and absorbing materials such as isostaticgraphite, Carbon Fibre Composite (CfC) and Silicon Carbide reinforced withSilicon Carbide fibres (SiC-SiC), were tested in the facility to assess theTDI's performance and to extract information for other BIDs using thesematerials. In addition to beam impact tests and an extensive Post IrradiationExamination (PIE) campaign, extensive numerical simulations were carried out.

High intensity proton beam impact at 440 GeV/c on Mo and Cu coated CfC/graphite and SiC/SiC absorbers for beam intercepting devices