Hollow electron-lens assisted collimation and plans for the LHC

Title: Hollow electron-lens assisted collimation and plans for the LHC

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Abstract

The hollow electron lens (e-lens) is a very powerful and advanced tool for active control of diffusion speed of halo particles in hadron colliders. Thus, it can be used for a controlled depletion of beam tails and enhanced beam halo collimation. This is of particular interest in view of the upgrade of the Large Hadron Collider (LHC) at CERN, in the framework of the High-Luminosity LHC project (HL-LHC). The estimated stored energy in the tails of the HL-LHC beams is about 30 MJ, posing serious constraints on its control and safe disposal. In particular, orbit jitter can cause significant loss spikes on primary collimators, which can lead to accidental beam bump and magnet quench. Successful tests of e-lens assisted collimation have been carried out at the Tevatron collider at Fermilab and a review of the main outcomes is shown. Preliminary results of recent experiments performed at the Relativistic Heavy Ion Collider (RHIC) at Brookhaven, put in place to explore different operational scenarios studies for the HL-LHC, are also discussed. Status and plans for the deployment of hollow electron lenses at the HL-LHC are presented.

Authors:

Mirarchi, D. ^[1]; Garcia Morales, H. ^[2]; Mereghetti, A. ^[3]; Redaelli, S. ^[4]; Fischer, W. ^[5]; Gu, X. ^[5]; Stancari, G. ^[6]

Manchester U.
Royal Holloway, U. of London
CERN
Goethe U., Frankfurt
Brookhaven
Fermilab

Publication Date:: 2018-06-21

Research Org.:: Brookhaven National Lab. (BNL), Upton, NY (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

OSTI Identifier:: 1463620

Report Number(s):: FERMILAB-CONF-18-311-AD-APC
1685068

DOE Contract Number:: AC02-07CH11359

Resource Type:: Conference

Resource Relation:: Conference: 61st ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams, Daejeon, Korea, 06/17-06/22/2018

Country of Publication:: United States

Language:: English

Subject:: 43 PARTICLE ACCELERATORS

Citation Formats


                    Mirarchi, D., Garcia Morales, H., Mereghetti, A., Redaelli, S., Fischer, W., Gu, X., and Stancari, G. Hollow electron-lens assisted collimation and plans for the LHC.  United States: N. p., 2018. 
        Web.

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                    Mirarchi, D., Garcia Morales, H., Mereghetti, A., Redaelli, S., Fischer, W., Gu, X., & Stancari, G. Hollow electron-lens assisted collimation and plans for the LHC.  United States.

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                    Mirarchi, D., Garcia Morales, H., Mereghetti, A., Redaelli, S., Fischer, W., Gu, X., and Stancari, G. Thu .  
        "Hollow electron-lens assisted collimation and plans for the LHC".  United States.  https://www.osti.gov/servlets/purl/1463620.

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@article{osti_1463620,

  title        = {Hollow electron-lens assisted collimation and plans for the LHC},

  author       = {Mirarchi, D. and Garcia Morales, H. and Mereghetti, A. and Redaelli, S. and Fischer, W. and Gu, X. and Stancari, G.},

  abstractNote = {The hollow electron lens (e-lens) is a very powerful and advanced tool for active control of diffusion speed of halo particles in hadron colliders. Thus, it can be used for a controlled depletion of beam tails and enhanced beam halo collimation. This is of particular interest in view of the upgrade of the Large Hadron Collider (LHC) at CERN, in the framework of the High-Luminosity LHC project (HL-LHC). The estimated stored energy in the tails of the HL-LHC beams is about 30 MJ, posing serious constraints on its control and safe disposal. In particular, orbit jitter can cause significant loss spikes on primary collimators, which can lead to accidental beam bump and magnet quench. Successful tests of e-lens assisted collimation have been carried out at the Tevatron collider at Fermilab and a review of the main outcomes is shown. Preliminary results of recent experiments performed at the Relativistic Heavy Ion Collider (RHIC) at Brookhaven, put in place to explore different operational scenarios studies for the HL-LHC, are also discussed. Status and plans for the deployment of hollow electron lenses at the HL-LHC are presented.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/1463620},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2018},

  month        = {6}

}

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