WCM dataset

Description

Wall Current Monitor

Static Fork

#WCMT*001
@HCI(S)[DI32,abc,HU32]
0,WCMT*001,0
@VMEMAP(S)[HU32,HU32,HU32,HU32,HU32,HU32,HU32,HU32,HU32,HU32]
0,48,80,48,200,400,200,100000,200000,100000
@ADCMODULE(A)[abc,A16M,DU32,DU32]
CALIBRAT,E3FF6000,0,1
SIGNALS_,E3FF6000,1,1
@SYSTEM(S)[abc]
/u2/dcs/source_linux/0_classes/WCM/code/wcproto_server.sh

Dynamic Fork

#WCMT*001
@HCI(S)[(DBL),DI32,DI32,HI32,DU32,DU32,DI32,TF,TF,TF,TF]
WCMT*001,0,000,0,0,1000,0,1,0,1,0
@VMEMAP(S)[HU32,HU32,HU32,HU32,HU32,HU32,HU32,HU32,HU32,HU32,HU32,HU32,HU32,HU32,HU32,HU32,HU32,HU32]
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
@SYSTEM(S)[DI16,DI16,DBL:4:9,DBL:4:9]
0,0,0.0:0.1:0.2:0.3:0.4:0.5:0.6:0.7:0.8:1.0:1.1:1.2:1.3:1.4:1.5:1.6:1.7:1.8:2.0:2.1:2.2:2.3:2.4:2.5:2.6:2.7:2.8:3.0:3.1:3.2:3.3:3.4:3.5:3.6:3.7:3.8,10.0:10.1:10.2:10.3:10.4:10.5:10.6:10.7:10.8:11.0:11.1:11.2:11.3:11.4:11
.5:11.6:11.7:11.8:12.0:12.1:12.2:12.3:12.4:12.5:12.6:12.7:12.8:13.0:13.1:13.2:13.3:13.4:13.5:13.6:13.7:13.8

WCM Acquisition Arrays

The WCM class has two live buffers of acquired data: one for the monitors crossed by the elecrons beam and one for the monitors crossed by the positrons beam.
Each buffer is a LabVIEW 2D-array DBL.

General information on LabVIEW 2D-arrays

LabVIEW 2D-arrays are written in memcached as two I32 numbers (number of rows and number o columns) followed by a series of DBL numbers (ordered row by row). The following example, reports the representation of a 2-rows, 3-cols array with the values: row 0 = [0,1,2], row 1 = [10,11,12]
Example of 2D array (3 columns, 2 rows):

Specific information WCM class 2D-arrays

In the WCM class case, the two 2-D arrays dimesions are: #rows = 4, #cols=9, so both arrays begin with:

The two WCM arrays are written, one after the other, at the end of the dynamic fork, after the two I16 values "mode" and "status". Each array consists of (4 * 9) = 36 DBL components = 288 byte, plus the two I32 leading values for the two dimensions, for a total of 296 byte.

• "mode" I32 (0=electrons, 1=positrons) at offset 109₁₀ [byte]
• "status" iI32 (0=LSP, 1=LBT, 2=LTA, 3=AMR / LSP+AMR) at offset 111₁₀ [byte]
• First array starting at offset 113₁₀ [byte] 
• Second array starting at offset 409₁₀ [byte]

Details