You are viewing an old version of this page. View the current version.

Compare with Current View Page History

« Previous Version 12 Next »

Document status
DRAFT
Document owner
Designer
Developers
QA

Description

This key contains the timing status 

Source

General Timing Window

Keys

Key nameSource

Write freq. [Hz]

Data size [byte]

Throughput
[kbyte/s]

FomatNotes
DAFNESTATE_JDAT

DEVIL387 (Apple DEVIL controlling the TIM class)

General Timing Window: it fetches from the DEVIL387 the GTIMDyn global and combines some of its data with information obtained from the Timing Status Word register. The result is a Json document written to Memcached.

~0~512~0

The key is updated when a user sets some parameter from the General Timing Window. The key content is a Json document with the following format.
{
  "bunch_seq_1_32":0,
  "bunch_seq_33_64":0,
  "bunch_seq_65_96":0,
  "bunch_seq_97_120":0,
  "accumulator_pulses":0,
  "linac_freq":0,
  "extraction_freq":0.0,
  "equidistant":0,
  "mode":0,
  "execution":0,
  "stand_by_state":0,
  "run":0
}

Values for the various fiedls are as consistent as possible with the "Timing Status Word" corresponding bitfields. In some cases the representation is modified in order to make it more intuitive (e.g. mode: -1=electrons, 1=positrons) or even directly usable (e.g. linac_freq: 25, 50 [Hz]). In other cases (execution, stand_by_state) the value is equal to the corresponding bitfield.

linac_freq: 25, 50 [Hz]
extraction_freq: 0.2, 0.5, 1.0, 2.0 [Hz]
equidistant: 0=contiguous, 1=equidistant
mode: -1=electrons, 1=positrons
execution: 1, 2, 4, 8, 16 (see table below)
stand_by_state: 1, 2, 4 (see table below)
run: 0=standby ,1=run

Total throughput

kbyte/sMbit/s
~0~0

Timing Status Word

bit [0-31]Variablebit valuescorresponding
value
bit valuescorresponding
value
bit valuescorresponding
value
bit valuescorresponding
value
bit valuescorresponding
value
0LINAC freq. [Hz]1

25

050





101





2extraction freq. [Hz]10.200.50102

30100

40010

50001

6contiguous/equidistant0contiguous1equidistant





7mode -/+0e-1e+





8execution0Go forever0Single sequence1Single cycle first bunch0Single cycle same bunch0Single cycle next bunch
900010
1000001
1101000
1210000
13standby state (*)1All Off LINAC standby0Spectrometer only 1Hz0Disable gun



14010



15001



16run/standby0standby1run





1710





18...31










  (*) "standby state" is the condition which is reached when a "standby" command is issued

  • No labels