Conduct of Operations
for
Jefferson Laboratory Hall A Experiment E93-027
May 7, 1998
All experiment personnel must acknowledge their familiarity with
this document as well as their intention to comply with all the conditions
defined within by sending an email message to Mark Jones (shift/personpower
coordinator of E93-027: jones@jlab.org) before performing any shiftwork.
1. Preface
The Thomas Jefferson National Accelerator Facility (JLAB, also Jefferson
Lab) operates the Continuous Electron Beam Accelerator Facility (CEBAF).
The scientific mission of JLAB is to explore the underlying structure of
hadrons and nuclei using the electromagnetic probe. CEBAF is a superconducting
electron accelerator with a nominal maximum energy of 4 GeV and 100% duty
cycle. The electron beam, with a maximum current of 200 mA,
can be used simultaneously for electron scattering experiments in three
experimental areas, Halls A, B and C.
As part of its mission, JLAB provides the resources necessary for international
collaborations of scientists to carry out basic research at the frontiers
of the field of nuclear physics and related disciplines. This research
must be conducted in a manner that ensures that Environmental, Health and
Safety (EH&S) concerns receive the highest consideration. At the same
time, the program goals of the laboratory require that it produces the
highest quality physics results efficiently.
Guidance on how to balance thoughtful, measured EH&S concerns with
efficient operation has been taken from the Department of Energy (DOE)
Order 5480.10, ``Conduct of Operations,'' the JLAB EH&S Committee,
the JLAB EH&S Manual, and the JLAB Director's Office. A graded
approach is followed in which the measures taken are matched to the scale,
the cost, the complexity and hazards of the operation.
2. Introduction
2.1 General Hall A Considerations
This experiment uses the experimental equipment in Hall A at JLAB, including
the beam transport system, beam dump, the two High Resolution Spectrometers
(HRS), the Hall A electronics and data acquisition system, and the scattering
chamber and cryogenic hydrogen/deuterium target system. The electron and
hadron arm HRS's will be in standard configuration. The Hall A Möller
polarimeter will be used to measure the polarization of the beam. The experiment
also requires use of the polarized electron source.
The procedures appropriate for the operation of the standard equipment
that will be used during the course of the experiment are contained in
the following documents:
-
Conduct of Operations for Jefferson Lab Hall A Experiment E93-027
(this document);
-
Hall A Experimental Equipment Operations Manual (a basic operations
manual for the Hall which includes discussions of the following subjects
and provides cross references to other appropriate documentation):
-
Procedures for Experiments;
-
Experimental Equipment Operation;
-
Safety Assessment Document for Hall A Equipment;
-
Personnel Allowed to Operate Hall A Equipment.
Reference copies of these documents are available at all times in the Hall
A Counting House for the duration of the experiment.
2.2 Description of E93-027
The physics goal of this experiment is to measure the ratio of the proton's
electric form factor to magnetic form factor between Q2 = 0.5
to 3.0 GeV2 and calibrate the polarimeter. A description of
the physics motivation of the experiment can be found in the 1993 proposal
to the JLAB program advisory committee (PAC). The detailed plan for carrying
out the experiment is contained in the E93-027 Run Plan, available in Counting
House A, and on the E93-027 Web Page.
http://www.jlab.gov/~jones/e93027/e93027.html
This experiment is a Hall A Collaboration Experiment and is part of the
Hall A EXPINT ''commissioning'' program. A list of the Hall-A collaboration
is provided at the end of this document as an Appendix.
3. Operations, Organization, and Administration
Figure1: Functional Organization of E93-027
The functional organization of the experiment is shown in Figure 1.
The operational organization of the experiment is directed by the Spokespersons
and the Hall A group leader. The immediate on-site management of
the experiment will be the responsibility of the experiment Run Coordinator.
The Run Coordinator will be in residence in the local JLAB area at all
times during a running period. The Run Coordinator is thus the overall
manager of the shift workers, including the shift leader. On-call Experts
or their designates provide backup support to the shift workers with responsibility
for oversight in their area of expertise.
The functions of the Run Coordinator are:
-
to oversee the execution of the run plan;
-
to manage the daily operation of the experiment, including its safe operation;
-
to coordinate interactions between JLAB and the experiment;
-
to represent the experiment at the weekly accelerator scheduling meetings
(Wednesdays at 13:30 in the MCC Conference Room) one week before the run
period, one week after the run period, and during the run period itself;
-
to represent the experiment at the daily operations meeting at 7:30 am
and 8:00 am in the MCC Conference Room or arrange for a representative
of the experiment to be present at this meeting;
-
to set and post goals for each shift and evaluate the progress of the experiment
and the quality of the data;
-
to ensure that the Hall A Group Leader, the accelerator Crew Chief, the
Program Deputy, and the Spokesperson are aware of all necessary issues;
-
to oversee and verify that the equipment is operated properly in accordance
with the Hall A Experimental Equipment Operations Manual;
-
to define the data quality measures appropriate for the goals of each shift;
-
to insure sufficient overlap and transfer of information between Shift
Leaders;
-
to discuss in advance significant changes to the run plan with the Hall
A Group Leader and to notify the Program Deputy;
-
to provide the Hall A Group Leader with a weekly overview of the accelerator
and Hall A equipment performance.
4. Shift Routines and Operating Procedures
There are two types of shifts for the time when the experiment is designated
as occupying Hall A: standby and operating. Operating shifts
are the normal status when beam is available for the experiment. Standby
shifts are periods designated by the Run Coordinator when beam is not available
in the Hall and none of the equipment that is operating requires continuous
monitoring. Standby status may result from normal operational planning
or from abnormal conditions such as a major down time for the accelerator
due to equipment failure.
4.1 Standby Shifts
During standby shifts, the shift personnel are not required to be on site
at JLAB, with the exception of the designated target expert, but
must be available via telephone contact to arrive at the Hall in an expeditious
manner in the event of a problem with equipment that is their responsibility.
The Run Coordinator will ensure that the shift checklist (see Table 1)
is executed at least once every 24 hours.
4.2 Operating Shifts
During operating shifts, 24-hour occupation of the Hall A area will be
maintained by crews of at least three people, in 8 hour shifts. One person
per shift is designated as the Shift Leader. This individual has the following
authority and responsibilities:
-
primary responsibility for carrying out the scientific program planned
for the shift by the Run Coordinator;
-
primary responsibility for monitoring the quality of the data being taken;
-
overall responsibility for the proper operation of the Hall A equipment
during the shift;
-
primary responsibility for coordinating the response of the shift crew
to emergency situations, including the notification of appropriate individuals
as outlined in the Jefferson Lab Emergency Response Plan and the
Hall A Emergency Checklist;
-
notifying the Run Coordinator of any circumstances that might have a significant
impact on the planned activities for that shift; this includes discussing
requests for any unplanned (but non-emergency) access into the Hall with
the Run Coordinator before starting to arrange for such an access;
-
primary responsibility for monitoring the operation of the Hall A equipment
and for the coordination of the response to and the reporting of all abnormal/unusual
occurrences. Reporting shall include entering the relevant information
in the Log Book, notifying the Hall A responsible staff member for the
relevant equipment, and notifying the Program Deputy as appropriate for
the system that had the occurrence;
-
acting as primary experiment contact between the Machine Control Center
(MCC) and experiment personnel. This includes authority to request entries
into the Hall;
-
primary responsibility for keeping accurate records of the operation of
the accelerator, experimental equipment, the simultaneous availability
of beam (standard electronic log), and for the reconciliation of the Hall
A records on beam availability with those kept by the Accelerator Crew
Chief at the end of the shift;
-
can authorize qualified personnel to make modifications in the experiment
configuration within the allowed parameters;
-
primary responsibility for the actions of shift crews under their leadership;
-
primary responsibility for orderly transition of crews at shift change
and writing the End-of-Shift Summary. This summary shall include
pointing out the existence of any new issues pertaining to the experiment;
-
primary responsibility for the Log Book containing a complete and accurate
description of the events and actions of the shift;
-
primary responsibility for ensuring that the shift check list is performed
and that the equipment is operating within expected normal operating parameters;
-
authority to limit the number of people in the Hall A Counting House or
the Hall itself as necessary to effectively and safely carry out the experiment;
-
authority to limit access to the Hall A aquisition computers if required
to effectively and safely carry out the experiment;
-
primary responsibility to ensure that malfunctioning equipment is properly
labeled, that the existence of the malfunction is reported both to shift
personnel and the individual(s) responsible for the operation and maintenance
of the equipment, and whenever necessary, to ensure the equipment is locked-out
by a trained responsible individual;
The number of persons assigned to a shift will normally be three or four.
The Shift Leader and several other shift workers will have training in
specific areas (spectrometers, detectors, beamline, and replay) and will
have oversight responsibility in those areas during their shifts. Shift
workers with oversight responsibility will have a designated leader who
will arrange their training. The shift schedule for each run period will
be clearly posted in the Hall A Counting House, listing the times of each
shift, the names of the personnel on shift, the target operator and the
Shift Leader for each shift. The shift schedule for each run period will
also be available on the E93-027 website:
http://www.jlab.org/~jones/e93027/e93027.html
Also posted will be the name of the Run Coordinator, as well as phone numbers
for support staff. The responsibilities of each shift member are to:
-
carry out the scientific goals of the shift in a safe and efficient manner
under the direction of the Shift Leader;
-
read the Log Book to be aware of changes in goals, operating parameters
and new documentation;
-
monitor the quality of the data being taken;
-
monitor the operation of all equipment for departures from normal operations
and report problems to the Shift Leader;
-
maintain adequate records of the progress of the shift;
-
be present in a timely fashion before the start of each shift so that a
smooth, coordinated transition between shifts may be accomplished;
In addition, each shift member is responsible for carrying out their work
in a safe and efficient manner, according to the rules and procedures documented
in the Jefferson Lab EH&S Manual and in the documents listed
in Section 2.1.
4.3 Shift Personnel Training
All personnel on shift are required to have successfully completed and
be current in the following Jefferson Lab safety training programs:
-
EH&S Orientation;
-
Radiation Worker Training;
-
Oxygen Deficiency Hazard Training.
In addition, all shift personnel will be trained in the safety procedures
to be followed for access to the Hall and its close-up prior to beam delivery.
This training will include a brief discussion of the purpose and operation
of the Personnel Safety System (PSS) for the Hall, a trained escort for
individuals the first time they enter Hall A on a controlled access, and
an escorted General Hazard Awareness Walk-Through of Hall A. At least one
person on each controlled access to the Hall must have been trained by
designated Hall A personnel in the proper procedures for such an access
into the Hall.
Individuals within the Hall A Collaboration may be required to have
other equipment or procedure-specific training as their responsibilities
demand. The need for such training shall be determined by the Spokesperson
or the Run Coordinator in consultation with the Hall A Group Leader and
Physics Division EH&S personnel.
All experiment personnel are required to have radiation badges in their
possession during an access to any radiological area. The two-person
rule is in strict enforcement for all entries into the Hall. It is
strongly recommended that hard hats are worn during an access. Ear protestion
must be worn when working near the scattering chamber.
Access to the Hall will be governed as described in the Jefferson
Lab Beam Containment Policy and Implementation document and by the
General Access Radiation Work Permit (RWP) for Hall A. This RWP
is kept in the Hall A Counting House. All personnel must read the RWP and
sign the log indicating that they have done so before entering the Hall.
A sign-up log is also kept at the PSS gate in Hall A for convenience. Work
in designated radiation areas will be governed by the Jefferson Lab
RadCon Manual. In particular, no material may be removed from the Hall
after beam delivery to the Hall without proper approval from an Assigned
Radiation Monitor responsible for the Hall or from the RadCon Group, as
appropriate.
5. Control of Equipment and System Status
The operation of the Hall A experimental equipment should be carried out
in accordance with the Hall A Experimental Equipment Operations Manual.
This document includes information on the normal response to alarms and
equipment malfunctions; however, in general, the basic emergency response
is to bring the situation to the attention of the Expert (see Figure
1) for the system in question after taking immediate response measures
that common sense and Jefferson Lab policies and procedures dictate.
The only individuals authorized to make significant modifications,
repairs and/or changes to the operating status of equipment are the Experts
or persons under their direct supervision. Significant changes to the operating
status of equipment include any changes within the stated safe parameters
of operation in the operating procedures that are beyond those described
in the Hall A Experimental Equipment Operations Manual as routine.
Shift personnel will make routine changes in operating conditions as specified
in the operating procedures. Authorized subsystem experts are also listed.
This list may be amended as necessary to reflect personnel and training
changes with the signed and written authorization of both an expert
for that subsystem and the Hall A Leader or his/her authorized designate.
A copy of these amendments will be maintained in the Hall A Counting House
attached to the reference copy of the Hall A Experimental Equipment
Operations Manual.
All general equipment installation, maintenance and testing activities
shall be carried out in accordance with the Jefferson Lab EH&S Manual.
6. Independent Verification
The basic check list given in Table 1 will be performed once per shift
during operating shifts and once per day during standby shifts. Additional
items may be added to the list at the discretion of the Run Coordinator.
The Run Coordinator will define a set of quality measures for the data
and communicate these to the shift crews. These measures may change over
the course of the experiment. The Hall A Experimental Equipment Operations
Manual provides a more general checklist for closing the Hall, and
for situations where the Hall A beam dump is used for accelerator development.
7. Logkeeping
A single series of hard bound Log Books will serve as the record of the
experiment. All relevant activities are to be recorded in these books,
including all changes of experiment conditions and equipment failures.
The quality of the information recorded in the Log Book is critical to
the ability of the Collaboration to ``make sense" of the data, through
careful correlation of events in the written history of the experiment
with the apparent changes in the experimental conditions inferred from
changes in the data stream.
The Log Book will also serve as the primary reference for the determination
of the operational efficiency of the Hall A apparatus. As such, it is essential
that it provide an accurate record of the capability of the equipment to
carry out the intended research program. Finally, the Log Book is the place
of record for all safety issues and for providing notification of all new
or updated documentation and procedures.
All data recorded electronically will be referenced in the Log Book
with the location of the appropriate files and media. The only exception
to the Log Book as the place of record is the experiment checklist mentioned
in Section 6, which will be stored in binders in the Hall A Counting House.
However, all deviations from normal operating parameters observed during
the checklist evaluation procedure will be recorded in the Log Book. All
Log Books will remain in the Hall A Counting House for the duration of
the experiment (unless they are being copied.). After the experiment has
been completed, the Log Books will be archived at Jefferson Lab for future
reference.
All entries in the log book should be in ink (preferably black for photocopying).
All entries and corrections should contain a time, a date, and the name
of the person making the notation. Initials may be used if the initials
are recorded in the master initial table at the beginning of the logbook.
| Bookkeeping |
DATE and TIME |
|
Shift Checklist Recorder |
| HRSe |
Magnet Currents |
|
Dipole Field |
|
Angle |
|
Collimator |
|
Cryogenic Fill Levels |
|
Drift Chamber Gas (gas shed) |
|
Drift Chamber HV/Current |
|
Pb-Glass HV |
|
Cerenkov Gas/Pressure |
|
Cerenkov HV |
|
Hodoscope HV |
| HRSh |
Magnet Currents |
|
DipoleField |
|
Angle |
|
Collimator |
|
Cryogenic Fill Levels |
|
Drift Chamber Gas (gas shed) |
|
Drift Chamber HV/Current |
|
Hodoscope HV |
| Vacuum |
Scattering Chamber |
|
HRSe |
|
HRSh |
| Electronics |
Status |
|
Visual Survey of CH |
| CODA |
Status |
| Target |
Position |
|
Temperature |
|
Pressure |
| Beam and Beamline |
Energy |
|
Current |
|
Rastering |
|
Duty Factor |
|
Special Conditions |
|
Switchyard Magnet Currents |
Table1: Items to be included in the shift checklist as appropriate
for the JLAB E93-027 apparatus configuration.
Appendix
The Hall-A E93-027 Collaboration
J. Berthot, P.-Y. Bertin, V. Breton, H. Fonvieille, S. Jaminion,
C. Jutier, G. Lavessiere, O. Ravel, Y. Roblin
Blaise Pascal University, Clermont-Ferrand, France
K. Aniol, M. Epstein, D. Margaziotis
California State University at Los Angeles
C. Howell, S. Churchwell
Duke University/TUNL
W. Boeglin, L. Kramer, P. Markowitz, B. Raue
Florida International University
A. Sarty
Florida State University
F. Baker, J. Templon
University of Georgia
S. Kox, J. Mougey, E. Voutier
Joseph Fourrier Universtiy, Grenoble, France
R. Madey
Hampton University
R. Wilson
Harvard University
R. de Leo
INFN, Bari, Italy
A. Leone, R. Perrino
INFN, Lecce, Italy
E. Cisbani, S. Frullani, F. Garibaldi, M. Jodice, G. Urciuoli
INFN, Roma, Italy
L. Cardman, J.-P. Chen, E. Chudakov, J. Gomez, O. Hansen, K. de
Jager, M. Kuss, J. LeRose, M. Liang, R. Michaels, S. Nanda, A. Saha, B.
Wojtsekhowski
Jefferson Laboratory
B. Anderson, M. Manley, G. Petratos, D. Prout, R. Suleiman, J.
Watson
Kent State University
D. Dale, B. Doyle, A. Gasparian, T. Gorringe, W. Korsch, V. Zeps
University of Kentucky
A. Glamazdin, V. Gorbenko, R. Pamatsalyuk
Kharkov Institute of Physics & Technology, Kharkov, Ukraine
E. Beise, H. Breuer, C.-C. Chang, N. Chant, L. Ewell, H. Holmgren,
J. Kelly, P. Roos
University of Maryland
W. Bertozzi, K. Fissum, J. Gao, S. Gilad, N. Liyanage, D. Rowntree,
J. Zhao, Z. Zhou
Massachussetts Institute of Technology
J. Calarco, F. Hersman, M. Holtrop, T. Smith
University of New Hampshire
M. Khandaker, V. Punjabi
Norfolk State University
K. Soldi, B. Vlahovic
North Carolina Central University
C. Hyde-Wright, C. Jutier, K. McCormick, L. Todor, P. Ulmer, L.
Weinstein
Old Dominion University
L. Bimbot
Institut de Physique Nucleaire, Orsay, France
G. Cates, K. Kumar, W. Miller
Princeton University
E. Brash, G. Huber, G. Lolos, D. Zainea, Z. Papandreou
University of Regina
R. Gilman, C. Glashausser, G. Kumbartzki, S. Malov, J. Mcintyre,
R. Ransome, P. Rutt
Rutgers State University
E. Burtin, C. Cavata, J. E. Ducret, B. Frois, N. d'Hose, J. Jardillier,
S. Kerhoas, D Lhuillier, J. Marroncle, J. Martino, D. Neyret, S. Platchkov,
T. Pussieux, P. Vernin
Centre d'Etudes de Saclay, CEA, France
R. Lourie
SUNY at Stony Brook
R. Holmes, W. Kahl, P. Souder
Syracuse University
L. Auerbach, S. Incerti, C. Martoff, Z.-E. Meziani
Temple University
K. Kino, K. Maeda, T. Saito, T. Terasawa, H. Tsubota
Tohoku University, Japan
T. Bauer
Utrecht University, The Netherlands
R. Lindgren, J. McCarthy, O. Rondon-Aramayo
University of Virginia
D. Armstrong, M. Finn, K. Griffioen, M. Jones, C. Perdrisat, G.
Quemener, G. Rutledge, K. Wijesooriya
College of William and Mary
S. Kato, H. Ueno
Yamagata University, Japan
A. Ketikyan, H. Voskanian
Yerevan Institute, Armenia
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