SANE Experimental Readiness Review Report 
June 27, 2008
Committee: Silviu Covrig, Chris Curtis, John Domingo,
Michael Epps, Charles Hightower, Mac Mestayer (chair)


INTRODUCTION:
The SANE and G1D experiments presented their state of
preparation for a run in the fall and winter of 2008
on June 26, 2008 to a committee appointed by Steve Wood.
This constitutes the committee's report.

Both experiments will use a polarized electron beam
of high energy (4.7 - 5.8 GeV) on a polarized target
(NH3 for SANE, ND3 & LiD for G1D), detecting the outgoing
electron in the BETA spectrometer in Hall C.  Both will
use the HMS spectrometer for various calibration runs.
Part of the SANE experiment will be run with the
target polarized transverse to the beam direction and
will require a beamline chicane.

We were asked to judge the readiness of the collaborations
to install and run the experiments and to pay particular
attention to a few items, including:
- re-use of the U.Va. polarized target
- work and safety issues involving the elevated platforms
and exposed magnetic field necessitated by the target
- status of the project schedule
- adequacy of the manpower
- and sufficiency of the documentation, especially regarding
environmental, health and safety issues.

GENERAL FINDING:
We find that the preparations for the experiment are in good
shape at this point: 3 months in advance of beam.  The target
and all of the detectors seem likely to be installed and ready
for commissioning by early October.  Operational and safety
documentation has been drafted.  Most significantly, the collaboration
has adequately answered all of the issues raised by a previous
readiness review and the persons responsible for the experimental
preparation and operation are all experienced.

We do have a number of suggestions and a check-list of reminders for 
the Hall C management and for the collaborations which we group by 
subject matter.

BEAMLINE:

1) Setting up and aligning the chicane beam line may take more time than 
the schedule shows.  The schedule needs to reflect the full amount of 
time required for installation activities. This should include pre-alignment 
and fiducialization of components, and especially the testing and 
commissioning of the chicane. This process will need to be thoroughly 
tested before the end of the installation shutdown; including BE, BZ, 
girder and target moves - to minimize impact during the run. This needs to 
be coordinated with the alignment group.

2) Work platforms (e.g. scissor lifts) will be needed to access the beamline
chicane magnets. These need to be available both during the installation
period, and for the run-time chicane movements.

3) The vertical motion control of the chicane magnets should be locked out
when not in use.

4) More drawings are needed for the beamline work.

5) Beam current monitoring (normal): re-establish the beam current and
position monitors.

6) Beam monitoring (with chicane and temporary dump): the plans here
seemed inadequate.  Consider putting the ion chambers above and below
the beamline rather than left and right and move them further away from
the dump.  Make a plan to set their sensitive threshold.  Implement some 
instrumentation (a viewer and/or a beam current monitor) that would give 
a positive indication that the beam is reaching the portable dump.

7) Beam Fast Shut-Down (FSD): review your plans for which instruments
can initiate an FSD signal.  Possible signals could be over-current
indicators from beamline BCM's, and under-current indicators from
beamline magnet power supplies.

8) Designate an "owner" of the beam rastering systems to provide
on-call assistance in case of malfunctions.  Consider putting 
MCC in control of the raster magnet operation.


BEAM OPERATIONS:

1) Coordinate with MCC to review beam setup and delivery procedures.
Incorporate any lessons learned from the HKS and GEn experiments.

2) In coordination with MCC develop a plan to re-install beam
current and beam position monitors in the relevant locations.

3) Communicate to MCC your strategy in case they cannot reach the
requested beam energy of 5.9 GeV.

TARGET OPERATION:

1) The target TOSP should include the list of current target experts.

2) The collaboration's target group should provide a short-hand version of a
target manual in the form of a "How To" list for operating the target. A
copy of this list should be available in the Hall C counting house for the
duration of the experiment(s) (it would be a good and quick reference for
target operators). The version control of the list should be managed by
a target expert.

3) Have a written plan for training target operators.

4) Estimate the energy released in a quench and predict likely scenarios
and mitigation strategies.

5) Estimate the effect of eddy currents induced by a magnet quench
in nearby conductors and mitigate if necessary.

6) Reserve enough time in the run plan for absolute calibration
of the target polarization.

7) Plan for irradiation of new target material.

DETECTOR OPERATION

1) Although not presented, we assume that there are "on-call"
experts to fix or mitigate hardware malfunctions of the detectors.

WORK PLANNING WITH OUTSIDE GROUPS:

1) Develop an over-all plan for alignment needs in coordination
with the survey group.  Alignment specifications should be clearly defined 
for each of the major components, in particular the hodoscopes, Cerenkov, 
and Big Cal. In addition, the positions of magnet(s) for the chicane move 
need to be defined and transmitted. Drawings and location information 
should be made available well ahead of installation.

2) Safety documents (Installation COO, TOSPs), when finalized, need to be
clearly communicated to all affected groups; including alignment, vacuum,
EES, etc.

GENERAL SAFETY ISSUES:

1) Consider engineering controls to limit access to the target platform
when the magnet is energized.

2) Wherever possible install railings to obviate the need for safety
harnesses.  Fall protection will be required if hand rails are not installed. 
This will include any areas four feet or higher from the floor.

3) Delineate the boundaries surrounding the target where the B-field exceeds
certain limits: e.g. 5 Gauss, 50 Gauss, etc.  Designate who
may enter each area (e.g. people with pacemakers or other sensitive
medical equipment may not enter a >5 Gauss area, or people with
tools or equipment made of ferromagnetic materials like steel may
not enter the >50 Gauss area).  The numbers we give here are only
examples; consult with the Jlab safety staff to define the actual
B-field "keep-out" areas.

4) Pay attention to guarding all high voltage connections.

5) Communicate all safety documentation to relevant outside groups
and individuals who will work in the hall. 

RADIATION ISSUES:

1) Because the beam current will be 100 nA or less, there should be
no radiation issues except contamination of the portable dump.
Consider methods to minimize the production of contaminated material
in this area, e.g. keeping dust to a minimum.