Home Page of the Snowmass 2001 Working Group M5:

Lepton-Hadron Colliders

 
 

Working Group Conveners: I. Ben-Zvi (BNL), G. H. Hoffstaetter (DESY) 
Organizing Committee Contacts: A. Chao, G. Dugan

Charge

Perform a survey of the present status as well as the vision of the future promise of the various lepton-hadron colliders. The colliders to be covered include those currently in operation, currently under construction, or envisioned as a possibility for the future, and in the US and abroad. Special emphasis should be placed on the clear identification of the beam physics limits and accelerator technology limits and an examination of the extent that they have been addressed by past research or need to be addressed by further research. Identify new and promising ideas even though they may need additional work. These issues should be addressed for all of the leading technical realizations of the lepton-hadron colliders. Finally, the group should summarize in a brief report (a few pages) the highest priority research topics for different technological realizations of lepton-hadron systems and provide an approximate schedule for key R&D developments. The group is also asked to provide comprehensive presentations to high-energy and accelerator physicists in plenary sessions during the Snowmass workshop. 

Contributed Talks

If you would like to contribute a talk please send an emal to Georg.Hoffstaetter@desy.de

Schedule
Day Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Date July 1 July 2 July 3 July 4 July 5 July 6 July 7
Morning
8:30-10:15
10:45-12:15
Plenary
Plenary
Physics Issues
Linac-Ring Colliders
WG P&T
Interaction Regions
Joint with T1
Ring-Ring Colliders
Room
Anderson
Anderson
Elbert
Elbert
  
Elbert
Elbert
Afternoon
13:45-15:45
16:15-18:00
Plenary
WG P&T
WG P&T
Holiday
Discussion
on physics issues
Polarization
Joint with T5
WG P&T
Room
Anderson
      
Elbert
Club
  

 

Day Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Date July 8 July 9 July 10 July 11 July 12 July 13 July 14
Morning
8:30-10:15
10:45-12:15
Cooling(A)
Joint with T5
Report Writing
Sources
Joint with T4
Plenary
Beam Dynamics
Physics with Colliders
Joint with E4
Room
  
Elbert
Plenary
Elbert
Anderson
Elbert
Elbert
Afternoon
13:45-15:45
16:15-18:00
  
Cooling(B)
Joint with T5
Ring Collider Projects
WG T&P
Plenary
Teach-in
WG T&P
Room
  
Club
Elbert
  
Anderson
    

 

Day Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Date July 15 July 16 July 17 July 18 July 19 July 20 July 21
Morning
8:30-10:15
10:45-12:15
  
Report Writing
WG T&M
Report Writing
Plenary
Plenary
Departure
Room
  
Elbert
  
Elbert
Anderson
Anderson
  
Afternoon
13:45-15:45
16:15-18:00
  
WG T&M
WG T&M
WG T&M
Plenary
Plenary
Departure
Room
        
Anderson
Anderson
  

Sessions of the Working Group:

Invited speakers should prepare 45-minute talks.  There is no limit on the discussion time and speakers should bring significant backup material. The speakers are requested to provide a brief written report on the subject they cover in electronic form (Word for Windows, Power Point or text file with separate graphic files) for the purpose of generating this report.  Overheads and video projectors are planned for all meeting rooms.  People are strongly encouraged to present talks electronically.  The presentations will then be available on this page.

Session Chairs will be responsible for keeping the timing of their session, to provide discussion times, and to specify important subjects for discussions. Session chairs are requested to provide a 1 to 2 page written summary of their session, which will be used for compiling the report of the Working Group.

Please send papers which are relevant to the scheduled subjects in electronic form to Georg Hoffstaetter . Please indicate under which session they should be listed.

Physics Issues (Tuesday, 3 July, 8:30-12:15)
Title Speaker
Lepton-Hadron Collision Physics, an Overview Abhay Desphande
Physics with Lepton-Ion Colliders Witek Krasny

These talks should lead to a wish list from the HEP community. This would the. be a good basis to think about accelerator goals. Finally one should specify a parameter list which seams achievable and interesting to both the Accelerator Physicists and the HE Physicists.

Session Chair: Max Klein

Relevant papers and links:

Linac-Ring Colliders (Wednesday, 4 July, 8:30-12:15)
Title Speaker
Linac Ring Colliders Lia Merminga
Physics with THERA, the TESLA on HERA Collider Max Klein
Physics with polarized beams in lepton-hadron colliders Albert DeRoeck
An Overview of Luminosity Limitations Ferdinand Willeke

Session Chair: Brett Parker
Relevant papers:

Interaction Regions (Joint session with T1 ) (Friday, 6 July, 8:30-12:15)
Title Speaker
Detector Issues of Lepton-Hadron Colliders Witek Krasny
The Accelerator Side of Interaction Regions Mike Seidel
Ideas for a Linac Ring Collider: TESLA on HERA Reinhard Brinkmann
Panel Discussion about the Interaction Region of Various Colliders 

The goals of the panel are to review the IR issues in existing and planned lepton-hadron projects, to identify the key problems, and to plan an active R&D program in the next few years.

List of issues assigned to panel members:
1. Collision frequency - Lia Merminga
2. Luminosity limits - Steve Peggs
3. Head-on collisions vs. crossing angle - Jim Norem
4. Communication between accelerator and particle physicists - Ferdinand Willeke
5. Particle and synchrotron radiation background - Douglas Hasell
6. Ranges of particle energy, luminosity, etc. - Witek Krasny

 Eberhard Keil (chair) 
Lia Merminga
Jim Norem
Steve Peggs
Douglas Hasell
Ferdinand Willeke
Witek Krasny

Session Chair: Eberhard Keil

Polarization (Friday, 6 July, 13:45-18:00) ( Joint session with T1 )
Title Speaker
Electron Polarization in Rings Desmond Barber
Proton Polarization Thomas Roser
Polarized Deuterons in Colliders Slava Derbenev
Polarized  Electrons in PEP II Alexander Chao

Session Chair: S.Y. Lee

Ring-Ring Colliders (Saturday, 7 July, 8:30-12:15)
Title Speaker
Ring-Ring Electron Ion Colliders Steve Peggs
An Ultimate Luminosity Electron-Ion Collider Alexander Skrinsky
Current Performance and Future Options for HERA Ferdinand Willeke

Session Chair: Maury Tigner
Relevant papers:

Cooling (A) (Monday, 9 July, 8:30-12:15) ( Joint session with T5 )

 

Title Speaker
Diffusion in Large Hadron Storage Rings Steve Peggs
An Overview of High Energy Electron Cooling Alexander Skrinsky
A Review of Stochastic Cooling John Marriner
Electron Cooling at FNAL Sergei Nagaitsev
High Energy Electron Cooling at DESY Klaus Balewski

Session Chair: Sergei Nagaitsev
Relevant papers:

Cooling (B) (Monday, 9 July, 13:45-18:00) ( Joint session with T5)

Session Chair: Slava Derbenev

Ring Collider  Projects (Tuesday, 10 July, 8:30-12:15)
Title Speaker
The Electron Ion Collider Chris Tschalaer
Lepton on Hadron Collisions in the LHC Tunnel Eberhard Keil
A Lepton-Hadron Collider in the VLHC Tunnels Jim Norem
VLHC with a Very Large Muon Collider Bruce King

Session Chair: Georg Hoffstaetter
Relevant papers:

Sources   (Wednesday, 11 July, 8:30-12:15)   (Joint sessions with T4 )

 

Title Speaker
Polarized e-Sources for Electron-Hadron Colliders Charlie Sinclair
Polarimetry Thomas Roser
Limitations for Light and Heavy Ion Beams Ulrich Ratzinger
Report on FNAL workshop on polarized RF guns Klaus Floettmann

Session Chair: John Sheppard

Beam Dynamics (Friday, 13 July, 8:30-12:15)
Title Speaker
Beam Dynamics Limitations in Proton Beams Weiren Chou
Energy Recovery Linacs and their Future Prospects Geoffrey Krafft

Session Chair: Georg Hoffstaetter

Physics with Colliders (Saturday, 14 July, 8:30-12:15)   ( Joint session with E4)
Title Speaker
Physics with the Polarized-Electron Light-Ion Collider Richard Milner
Physics Potential of an e-p Collider at the VLHC Steve Magill

Session Chair: Jon Butterworth

Written Report

A report of the Working Group should be produced at Snowmass (15-25 pages), together with a 1 to 1.5 page executive summary. Since these reports may be useful to the HEPAP long-range planning subpanel, which has a very tight time schedule, the report and the executive summary need to be completed, in rough draft form, by the end of the Snowmass meeting. This will require devoting some of the time at Snowmass, perhaps in the last week, to writing up the report and summary.
  1. Executive Summary (2 pages)
  2. Present Status

    3. We will perform a survey of the present status as well as the vision of the future promise of the various lepton-hadron colliders. The colliders to be covered include those currently in operation, currently under construction, or envisioned as a possibility for the future, in the US and abroad.
  3. Beam Physics Limits

    4. Special emphasis should be placed on the clear identification of the beam physics limits and accelerator technology limits and an examination of the extent that they have been addressed by past research or need to be addressed by further research.
  4. Promising Ideas

    5. Identify new and promising ideas even though they may need additional work. These issues should be addressed for all of the leading technical realizations of lepton-hadron colliders.
  5. Research Topics

    6. Finally, the group should summarize in a brief report (a few pages) the highest priority research topics for different technological realizations of lepton-hadron systems and provide an approximate schedule for key R&D developments.

Contributed papers

Complete reports from individual working groups as well as contributed papers will be collected in proceedings of the conference. SLAC will probably be in charge of the proceedings, and it is anticipated that they will be published in electronic form only.

Presentations

The group is asked to provide comprehensive presentations to high-energy and accelerator physicists in plenary sessions during the Snowmass workshop.
  1. Interim Status Report - Georg Hoffstaetter
  2. Closing Plenary - Georg Hoffstaetter
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Last Update: August 11, 2001