Experiment Liaison Duties
The art of effective experiment preparationand setup
Michael Aiken

Our Machine• CEBAF– 6 GeV– ~100uA• Experimental Halls– 2 Electron– 1 Photon• Experiment types/classes– Class 1 & 2

The Operations Group• Operational Hours– 24/7• Duration of Runs
– Typically 3-6 months– Downtimes of 1-3 months• Shift Rotation– 6 Crews– 8 Hour shifts

The Operations Group• Staff Structure– Group Leader– Crew Chiefs / Supervisors– Operators• Typically Shift Staff– 1 Crew Chief– 2+ Operators

Experiment Setup Complexity• Beamline Components– Chicanes– High Magnetic Fields– Multiple Dumps• Required Readbacks– Magnet Currents– Insertable Devices• Liaison needed– Crew Chief or Operator for each Hall

Collecting Information• Meetings– Weekly Meetings– Collaboration Meetings– Installation Meetings• Feedback provided– Extra Viewers– Extra Correctors

Relaying Information• Setup Procedure• Expert Talks

Knowing the Beamline• Beam line Drawings• Tours

The Hall Binder• Binder
EXPERIMENT LIAISON CHECK LIST
Name:
Experiment Number:.
.

All questions in the following table require a Yes or No response. If a Yes box ischecked, you will need to perform a follow up with the experimenter. Insert all pertinent
information in the Experiment Liaison Binder and also pass it along to the group via
email or during the group meetings.
Yes

NoQuestion
Should a tour of the hall be scheduled?
Are there new MPS issues?
- FSD channels- Raster issues- Additional Interlocks- BLMs or Ion Chambers
Are there new PSS issues?
- R/S boxes- Sweep procedures- Expected access rate per shift
Are changes or additions to the Operational Restrictions Power Requirements needed?
Are there additional safety concerns (i.e., physical hall hazards)?
Are there new beam line changes that require new song sheets?
Are there odd energies or currents that require changes to standard operatingprocedures?
Are routine measurements needed?
- Polarization- Energy- Current
Are there target concerns that differ from standard?
Are there new systems or significant changes to existing systems?
- Magnets- Diagnostics- Other
Are there signals that need to be routed to the MCC?
Are new procedures required?
In your opinion is Operator training required?
- Hardware- Software- Physics
Is there a minimum or maximum run length?
Does the experimenter have any MCC concerns?
Does this experiment impact operations such that a liaison needs to be assigned?
Is the information on the Physics/MCC Experiment Planner form correct?

PHYSICS/MCC EXPERIMENT PLANNER
Experiment Title:
Experiment #Hall

Start/Finish Dates
Start:

Total Beam Hours

Finish:Experiment Contact Person:
Physics Liaison:
Accelerator Representative:
Operations Representative:
Standard Meeting Times:
Special Meetings/Presentations:
Brief Description of Experiment (as relevant to Operations):

Phone:
Pager:
Phone:
Pager:
Phone:
Pager:
Phone:
Pager:
Meeting Location:

E-mail:Office:E-mail:Office:E-mail:Office:E-mail:Office:Applicable Reading Material:
Beam Requirements:
0.845 GeV
(1-pass)

Standard Energy (pass)
Nonstandard Energy (specify)
Current(s) @ Given Energy# of Hours at Each Energy/Current
Polarization (%)∆E/E
Beam Energy Stability
Beam Size (horizontal)
Beam Size (vertical)
Beam Size Stability
Target Types
Special Concerns:
Special MPS or PSS Issues::

1.645 GeV
(2-pass)

2.445 GeV
(3-pass)

3.245 GeV
(4-pass)

4.045 GeV
(5-pass)

Webpage• Webpage
http://www.jlab.org/accel/ops/ops_liaison/Hall_C/qweak.ht
ml