How Accelerator Operations Does Business atJefferson Lab

Thomas Jefferson National Accelerator Facility
Newport News, Virginia, USADavid W. Green, Jr, Jefferson Lab, 12000 Jefferson Ave., Newport News, VA 23606

ABSTRACTCONTROL ROOM CONFIGURATION

The accelerator is staffed 24 hours a day by the MCC
Operations Group. Shift rotations are for seven days on shift,followed by seven days off shift, of which three days arespent on off-shift activities. Personnel spend 70% of theirtime on shift and 30% off shift. The off-shift time is utilized
for meetings, training and individual projects. Individualprojects can consist of hardware or software development,training, documentation development or other areas ofinterest, depending on the individual.

MCCSafety System
Operator Console

Machine Operations Consoles

D GREEN

Operations Data
Laboratory mission:
Jefferson Lab's mission is to provide forefront
scientific facilities, opportunities and leadershipessential for discovering the fundamental nature ofnuclear matter, to partner with industry its advanced
technology, and to serve the nation and its
communities through education and public outreach,
all with uncompromising excellence in environment,
health and safety.

Control Room Area: 130 m²
Display Screens:

An accelerator day begins at 2300 and ends at 2259. This period is divided into 3 distinct shifts:

Type of accelerator:
Recirculating Linac Machine utilizing
Superconducting Electron Accelerating Technology

Owl Shift (2300 – 0700)
Day Shift (0700 – 1500)
Swing Shift (1500 – 2300)

ACCELERATOR OPERATIONS

Maximum current (uA):180
Commissioning date:
1994
Number of staff in MCC Operations Group:
21
Type of maintenance program:
Preventative/Opportunistic

MCC
M. SPATA

Jefferson Lab utilizes an electronic logbook.
JEFFERSON LAB CONTROL SYSTEMThe Control Systems at Jefferson Lab are based on the Experimental and Industrial
Control System (EPICS). EPICS uses a client/server model and pr ovides communication
between computers distributed around the Jefferson Lab site. At Jefferson Lab, EPICS is
used for control and monitoring of the Continuous Electron Beam Accelerator, theexperimental halls and the Free Electron Laser (FEL). The EPICS configuration for theaccelerator utilizes Motorola VME boards as IOCs and HP-UX Workstations for highlevel control, data archiving, retrieval and visualization and operator interfaces in thecontrol room.

Each MCC Control Room crew consists of a Crew Chief and two or three operators.

A. HUTTON

Maximum energy(GeV):530

The Program Deputy (PD) is a Jefferson Lab staff member
appointed to serve for two week periods. During the two week
period, the PD is responsible for the accelerator program for allshifts. The PD conducts the Daily Summary meeting andcommunicates with all shifts on a daily basis.

Shifts for the operators and Crew Chiefs are staggered by one hour, with the operators
starting shift one hour later than the Crew Chiefs (0000, 0800, 1600)

SOURCE
M. POELKER

SOFTWARE
K. WHITE

The Operations Department has developed several trainers to help
new operators learn various aspects of machine operations.

OPERABILITY
S. SUHRING

SAFETY SYSTEMS
K. MAHONEY
RF/EE SUPPORT

Number of Operators per shift:
3 (1 Crew Chief and 2 operators)
Percentage of time Operators operate:70%

R. LAUZE
O. GARZAJ. MUSSON
R. NELSON
W. MERZ
RADCONR. MAYThe Program Deputy (PD) develops a shift plan for each shift, detailing theprogram plan, any operating limits, special test plans and any other pertinent
information for that shift.
RF SEPARATION TRAINER

Years of experience for operators:
Total Mean:
3.9
Total Median:
2.8
Crew Chief Mean: 6.9
Crew Chief Median: 7.5
Operator Mean:
Operator Median:

2.3
2.3

A new operator typically has a physics
background or US Navy nuclear power
training.
The Lost Time Report breaks the sources of accelerator downtime
for the previous week into specific events.

The PD Weekly Summary details Program Goals for the previous andupcoming week in order of priority.

SAFETY SYSTEM OPERATOR TRAINER

Repair and troubleshooting of failed components during beam operation is coordinated between the EES Group and theOperations crew. The Operability Manager has responsibility for operability of the accelerator and will assist in the planningand scheduling of planned maintenance and installation activities.

*Work supported by the U.S. Department of Energy, contract DE-AC05-84ER401050