Fermilab Test Beam Facility

Controlled access

Each primary experiment for MT6 and MC7 will have a small number of Controlled Access Leaders (CALs). They will be specifically trained by one of the FTBF managers to ensure they understand the distinct procedures for accessing the beamline areas. These CALs will be responsible for ensuring group members follow the two-person system and one-person/one-key rules, and for coordinating accesses between groups if there is parasitic running taking place. See the Training page for more information about CALs.

Only someone on the List of CALs can call the MCR to request a controlled access.

Everyone accessing the beam enclosure must have the appropriate training.

Note that we have a practice gate available if you are unsure of the procedure or would like to practice before going in the first time.

To request keys:

• Call the MCR (x3721) from the key tree.  Tell them where you are (written on the key tree) and request to make a Controlled Access. Remain on the phone with them the entire time of this procedure.
• They will put you on hold for two minutes while they disable the beam and walk across the room to unlock the key tree; the light will turn green.
• To open the key tree, push on the green button, while pulling the door open.
• Remove a key from the keytree by turning it and then pulling it out.
• Read the 4-digit key number to the Operator on the phone.
• Tell them the ID number of the person you are handing the key to, including letter.
• One key must stay in the key tree in case of emergencies.

To return keys

1. Call the MCR, following the instructions from above to open the key tree.
2. Tell them the key number of each key as you place it back in the box.
3. Ensure all the keys in the keytree are turned, or the MCR will not be able to establish the beam.

Remember to follow the controlled access procedure or you will drop the interlocks and will need to re-secure the area. Requesting too many secures may lead to a slower response from the MCR. Accidentally dropping the interlocks several times may result in the rescinding of privileges or require that you attend more training.

Open access

Open access means the interlocks are dropped and anyone can access the enclosures with close-toed shoes. Training other than GERT and FTBF Hazard Awareness is not necessary, nor is dosimetry. Persons who do not have GERT or FTBF Hazard Awareness must be escorted at all times. Signing in is not required.

To open the enclosures a user must have the permission of either the primary running experiment, or the FTBF coordinator.

1. Call the MCR, x3721 from the key tree of the enclosure you wish to open. Tell them where you are and request to go into Open Access.
2. They will put you on hold for two minutes while they disable the beam and walk across the room to unlock the key tree; the light will turn green.
3. While still on the phone, open the key tree by pushing on the green button, while pulling the door open.
4. Remove a key from the keytree by turning it and then pulling it out, and open the door you are standing next to, the operator will watch you from the camera.
5. Once the door is open and the interlocks are dropped replace the key in the keytree, and shut the door.

You are now in Open Access.

If the Interlocks are dropped accidentally, you must call the MCR immediately and inform them of what happened. Then request a secure, or use the exact phrase “We would like to go into Open Access now.” You must use this exact phrase even if the MCR calls you.