Table of Contents
Role of the Operator in Charge [return to top]
The Operator in Charge has the authority and responsibility to safely and efficiently operate the Coupled Cyclotron Facility. Decisions of the Operator prevail. Users can request review of Operator decisions through the Manager for User Relations.
- The name and a photograph of the Operator in Charge are displayed on the data-U status monitors. Experimenters can visit or call (x 305) the Operator in the control room or page the Operator (x 143) if needed. The Operator has one of two 2-way radios with him when performing duties outside the control room (the other radio is charging). These radios can be contacted by dialing 9-2-8090, waiting for the tone, then dialing either 750019 or 750020.
- In the event of facility equipment breakdown the Operator in Charge performs an initial assessment and coordinates the response. The Operator also routes requests from experimenters for after-hours laboratory resources to appropriate lab personnel.
- Experimenters are not allowed to change beam attenuator settings without approval from the Operator in Charge. This approval may be granted to individual experimenters for the duration of their shift. Changing to the wrong beam attenuator can cause severe damage to the cyclotrons and to experimental equipment.
- The Operator has the authority to take control of the beam at any time if this is required for the safe and efficient operation of the Coupled Cyclotron Facility.
- The Operator in Charge needs to know the status of the beam at all times.
- The Operator releases beam to the experiment by stopping the beam on a beam blocker and informing the experimenter that beam of a specified intensity is available for the experiment on a specified beam blocker. The Operator hands the beam control key to the Experimenter in Charge. The experimenter can then remove the beam blocker with the beam control key.
- The experimenter relinquishes the beam by inserting the same beam blocker and returning the key to the Operator who then assumes control of the beam.
- Operators rotate shifts at 7 am, 3 pm, and 11 pm on weekdays, and 11 am and 11 pm on weekends. During shift changes operators are busy with shift-change duties. Operators will visit the experiment towards the beginning of their shift as their duties permit.
- Operators need to take control of the beam every few hours to measure and record machine parameters and to tune up the beam. While this can often be done efficiently if experimenters make the Operator aware of any time periods where the beam is not used for the experiment, the Operator in Charge must take control of the beam and tune up whenever beam losses increase significantly.
- The Operator in Charge keeps the experimenters aware of the cyclotron status.
Role of the Experimenter in Charge [return to top]
- An Experimenter in Charge must be identified by the Spokesperson during the period the experiment number is displayed in the data-U as current experiment. This includes the time needed to tune the beams for the experiment.
- The Experimenter in Charge must be able to answer questions about the experiment and its status on behalf of the Spokesperson.
- The Experimenter in Charge must keep the Operator aware of the experiment status (running or not running), breakdowns of or problems with facility hardware and functions, and vault entries.
- The Experimenter in Charge receives beam from and hands beam to the Beam Physicist or Operator in Charge via the red User Lockout Beam Blocker button following the established procedure.
- The name of the Experimenter in Charge is displayed on the data-U status monitors. Experimenters can change the name of the Experimenter in Charge by asking the Operator (x 305) to change it at any time.
- We suggest that the Experimenter in Charge visit the control room towards the beginning of an experimental shift.
- Prior to entering the experimental vault the appropriate beam blocker and wall plugs must be inserted (in this order) for radiation protection. The experimenters can request that the Operator insert them. After securing the vault, the wall plug can be retracted, then the beam blocker, so that the wall plug never gets irradiated. If experimenters anticipate spending more than a few minutes in the vault, the beam should be relinquished so that the Operator can use the time to measure beam parameters.
Handing Over Beam between Operators, Beam Physicists, and Experimenters [return to top]
Control over the beam is handed to and from the experimenter with the beam blocker in image 3 of the A1900 inserted. Experimenters can control this beam blocker with the red User Lockout Beam Blocker insert and the green User Lockout Beam Blocker retract buttons in each Data-U.
Handing beam from the operator or beam physicist to the experimenter
Operator in Charge or Beam Physicist verify that the User Lockout Beam Blocker is inserted and put beam on the User Lockout Beam Blocker.
- Operator in Charge or Beam Physicist inform Experimenter in Charge that beam is available on the User Lockout Beam Blocker with a primary beam attenuation of xxxxx. Beam Physicist hands key to Experimenter in Charge, if applicable.
- Experimenter in Charge verifies the attenuation on the display in the data-U and retracts User Lockout Beam Blocker when appropriate.
Handing beam from the experimenter to the operator or beam physicist
- Experimenter inserts User Lockout Beam Blocker.
- Experimenter inserts wall plug and viewer to protect experimental setup if key is handed back to Beam Physicist for tuning past the beam blocker.
- Experimenter in Charge informs Operator in Charge or Beam Physicist that the beam has been relinquished and hands key to Beam Physicist.
The Operator in Charge and the Beam Physicists only relinquish beam to the Experimenter in Charge, whose name appears on the data-U display.
Access to Secured Experimental Vaults [return to top]
Anyone working in experimental vaults must be familiar with the protective CCF interlock system.
- To gain access to a secured experimental vault:
- Ensure that the proper beam blocker and wall plugs (see below) are inserted. The experimenter can request this from the Operator
- Open the shield door to the vault.
- Enter the experimental vault with any surveying equipment (ion
chamber, geiger counter) specified by the health physicist during
the dose assessment for the experiment.
- To vacate and secure an experimental vault:
- Visually inspect vault and ensure that everyone else is out of
the vault before closing.
- Arm the interlock system by pressing the arm-box button(s) inside
- Close the shield door.
- Inform the Operator in Charge who will retract the appropriate
- If you are in a vault and the shield door is closed or closing:
- Press any arm-box button or the "Emergency Stop" button
located next to the shield door.
- Press the fluorescent "Open Door" button next to the
Radiation safety interlock conditions to be met to enter vaults.
||Conditions to be met
|K500 bypass mode
||F5FC5 - IN
K500 RFBypass key - ON
Spiral Inflector HV - OFF
|K500 secure with K1200 open
||N036FC - IN
N040WP - IN
|K1200 bypass mode
||ECR/K12 rad beam stop - in
K 1200 RFBypass key - ON
Inflector HV - OFF
|N2 vault access
||B127VP - IN
B129WP - IN
|N4 vault access
||A173VP - IN
A176WP - IN
|S2 vault access
||G145VP - IN
G151WP - IN
F143VP - IN
F145WP - IN
|S3 vault access
||I176VP - IN
I179WP - IN