DESY Access Control System.

Michael Bieler
DESY Access Control System
WAO 2010, Daejeon, April 15 2010

Content> DESY

> DESY‘s accelerators> The access control system> The personnel interlock system> Summary> Acknowledgement

Michael Bieler | DESY Access Control System | April 15, 2010 | Page 2

DESY> DESY is one of theworld's leading centres
for the investigation of thestructure of matter.
> DESY develops, runs
and uses acceleratorsand detectors for photon
science and particle
physics.
> Approximately 2000
employees.
> More than 3000 guest
researchers from morethan 40 countries
annually.

Michael Bieler | DESY Access Control System | April 15, 2010 | Page 3

DESY‘s Accelerators> 6 different accelerators> 30 interlock doors> 1 control room

Michael Bieler | DESY Access Control System | April 15, 2010 | Page 4

The DESY Access Control System
The access control system consists of> an access card (RF-ID) for every
employee> a personnel data base
> a data base for access rights> a central server for the system> local controllers> card readers at doors etc.

Michael Bieler | DESY Access Control System | April 15, 2010 | Page 5The Access Control System
If a card is read at a card reader> the access right of this card at thistime at this door is checked in thedata base
> the blue light in the card reader turns-red if the card is invalid at this door-

green if the card is valid at this door

If the light turns green> a relay in the card reader closes andactivates for example a door releasebuzzer.

Michael Bieler | DESY Access Control System | April 15, 2010 | Page 6

The Access Control System
The access right depends on different criteria:> For the library door:-library user

> For an accelerator door:-

general radiation training-

general safety training-

local radiation training for this area-

local safety training for this area

Michael Bieler | DESY Access Control System | April 15, 2010 | Page 7

The Personnel Interlock System
Every entrance door to an accelerator> is yellow> has a yellow radiation sign(illuminated when the beam permit isgiven)> has a red sign ‘Interlock set’(illuminated when the interlock is set)> has an intercom station and acamera> is equipped with 2 door contacts> does not have a door handle> has a card reader> has a key box
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The Personnel Interlock System
During shutdown periods> the yellow radiation sign is off> the red sign ‘Interlock set’ is off> the card reader activates the door
release buzzer if a valid card is read.

Michael Bieler | DESY Access Control System | April 15, 2010 | Page 9

The Personnel Interlock System
During operations periods> the yellow radiation sign is on> the red sign ‘Interlock set’ is on> the card reader is not connected tothe door release buzzer.

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The Personnel Interlock System
Temporary Access> The area is searched and theinterlock is set.
> A small number of people want toenter the area for a short time
without breaking the interlock.
> No search is necessary after thetemporary access.

Michael Bieler | DESY Access Control System | April 15, 2010 | Page 11

The Personnel Interlock System
Temporary Access Step by Step:
1 People call the control room throughthe intercom

2 The beam is dumped, beampermission taken away, the yellow
light goes off.
3 The access cards are read by the card
reader to check the access rights ofthe people at this door at this time.

4 The card reader transfers the names
and the access rights to the control
room, the names are written down ina paper log.
Michael Bieler | DESY Access Control System | April 15, 2010 | Page 12

The Personnel Interlock System
Temporary Access Step by Step:
5 The operator releases one key perperson and makes sure that every
person takes one key.
6 The operator presses a button tobypass the door contacts and toactivate the door release buzzer. The
red light goes off.
7 The people open the door, go in andclose it again.
8 The operator releases the button, thered light goes on, the door contacts
are active again.

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The Personnel Interlock System
Temporary Access Step by Step:
9 The people come back and call thecontrol room from the intercom at theinner side of the door.
10 The operator presses a button tobypass the door contacts and toactivate the door release buzzer. The
red light goes off.
11 The people open the door, go out
and close it again.
12 The operator releases the button, thered light goes on, the door contacts
are active again.

Michael Bieler | DESY Access Control System | April 15, 2010 | Page 14

The Personnel Interlock System
Temporary Access Step by Step:
13 The people give back the keys.
14 The operator writes the names in thepaper log.
15 The beam warning is given.
16 The beam permission is given.

17 Injection!

Michael Bieler | DESY Access Control System | April 15, 2010 | Page 15

Summary> The access control system checks access rights and opens doors.
> The personnel interlock system makes sure that nobody is inside anactive accelerator.
> Both systems are connected to- check the access rights and open the door through the access control
system if the interlock is not set- check the access rights and transfer names before a temporary access

Michael Bieler | DESY Access Control System | April 15, 2010 | Page 16

Acknowledgement> The access control system described in this talk was build up by Sabine
Brinker, Carsten Kluth and Dietrich Ramert with a lot of contributions
from the DESY groups MPY, MBB, MPS, F-EPOS and D3.
Thanks to all of them!

Michael Bieler | DESY Access Control System | April 15, 2010 | Page 17