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Defining a Naming Convention for devices in the LCLS Control System has been an iterative process. The first version was a variation on the existing SLAC SLC Naming Scheme. With the LCLS and the addition of X-Ray transport lines and experimental halls, we decided to extend the Original LCLS scheme to what is described here.

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h1. Format Summary

Devices are named with a sequence of characters in the following format:
{center}{*}DeviceType* : *Area* : *Position{*}{center}
An example of a device name looks like this:
{center}{*}QUAD* : *IN20* : *122* {center}
There are functions and parameters associated with devices, which also need to be identified. An _Attribute_ field provides that information:
{center}{*}DeviceType* : *Area* : *Position* : *Attribute* {center}
The _DeviceType_ and _Position_ fields also have optional characters. We can denote optional symbols with *\[* and *\]*, so the names can be described as:
{center}*\[* DeviceType *\]* *DeviceDetail* : *Area *: *\[* PositionPrefix *\]* *Position* : *Attribute* {center}
*To summarize*:
* A Device is named by 3 fields, separated by 2 colons.
* A function or parameter of a device, known internally to the Control System as a Process Variable (PV) is named by the 3-field device name followed by another colon, and the Attribute field.

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Table 1.11

Area

Position Prefix Codes

Physical Position

LR20

 

Laser Room (Upstairs, near sector 20)

 

IN20

B

Beam Line

 

K

Klystron Gallery

 

W

Waveguide

 

R

RF Equipment Hut

 

LI20

B

Beam Line

 

W

Waveguide

 

K

Klystron Gallery

 

E

Instrumentation Equipment Alcove

 

LI21

B

Beam Line

 

W

Waveguide

 

K

Klystron Gallery

 

E

Instrumentation Equipment Alcove

 

LI22

B

Beam Line

 

W

Waveguide

 

K

Klystron Gallery

 

E

Instrumentation Equipment Alcove

 

LI23

B

Beam Line

 

W

Waveguide

 

K

Klystron Gallery

 

E

Instrumentation Equipment Alcove

 

LI24

B

Beam Line

 

W

Waveguide

 

K

Klystron Gallery

 

E

Instrumentation Equipment Alcove

 

LI25

B

Beam Line

 

W

Waveguide

 

K

Klystron Gallery

 

E

Instrumentation Equipment Alcove

 

LI26

B

Beam Line

 

W

Waveguide

 

K

Klystron Gallery

 

E

Instrumentation Equipment Alcove

 

LI27

B

Beam Line

 

W

Waveguide

 

K

Klystron Gallery

 

E

Instrumentation Equipment Alcove

 

LI28

B

Beam Line

 

W

Waveguide

 

K

Klystron Gallery

 

E

Instrumentation Equipment Alcove

 

LI29

B

Beam Line

 

W

Waveguide

 

K

Klystron Gallery

 

E

Instrumentation Equipment Alcove

 

LI30

B

Beam Line

 

W

Waveguide

 

K

Klystron Gallery

 

E

Instrumentation Equipment Alcove

 

BSY0

B

Beam Line

 

E

Surface Equipment Building (Bldg 136, 106, 106, 5)

 

P

BSY Pump Station (P0, P1, P2, P3, P5)

 

 

BSYA

B

Beam Line

 

E

Surface Equipment Building (Bldg 136, 106, 106, 5)

 

P

BSY Pump Station (P0, P1, P2, P3, P5)

 

 

BSYB

B

Beam Line

 

E

Surface Equipment Building (Bldg 136, 106, 106, 5)

 

P

BSY Pump Station (P0, P1, P2, P3, P5)

 

 

BSYN

B

Beam Line

 

E

Surface Equipment Building (Bldg 136, 106, 106, 5)

 

P

BSY Pump Station (P0, P1, P2, P3, P5)

 

BSYS

B

Beam Line

 

E

Surface Equipment Building (Bldg 136, 106, 106, 5)

 

P

BSY Pump Station (P0, P1, P2, P3, P5)

 

LTU0

B

Beam Line

 

E

Surface Equipment Building (Bldg 5 or 911)

 

LTU1

B

Beam Line

 

E

Surface Equipment Building (Bldg 105 or Bldg 406 or

 

 

Bldg 911 or Bldg 912 or Bldg 913)

 

MCC0

E

Equipment Rack Area (Bldg 5)

 

C

Control Room

 

UND1

B

Beam Line

 

E

Surface Equipment Building (Bldg 913,921)

 

DMP1

B

Beam Line

 

E

Surface Equipment Building (Bldg B921)

 

FEE1

B

Beam Line

 

 

Hard (High-energy) through Branch (South) to Hutch 3 and beyond

 

1

Soft (Low-energy) Branch (North) to Hutch 1

 

2

Soft (Low-energy) Branch (Middle) to Hutch 2

 

E

Equipment Rack Alcove or Surface Equipment Building (Bldg 940)

 

NEH1

B

Beam Line

 

 

Hard (High-energy) Branch (South) to Hutch 3 and beyond

 

1

Soft (Low-energy) Branch (North) to Hutch 1

 

2

Soft (Low-energy) Branch (Middle) to Hutch 2

 

E

Surface Equipment Building (Bldg 950)

 

XRT1

B

Beam Line

 

 

Through Branch

 

4

North Branch to Hutch 4

 

5

Middle Branch to Hutch 5

 

6

South Branch to Hutch 6

 

E

Surface Equipment Building (Bldg 960)

 

FEH1

B

Beam Line

 

4

North Branch to Hutch 4

 

5

Middle Branch to Hutch 5

 

6

South Branch to Hutch 6

 

E

Surface Equipment Building (Bldg 999)

XT01

B

Beam Line

 

 

Surface Equipment Building (Bldb 062)

SYS0

 

System

SYSW

 

Global System West

SYSE

 

Global System East

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