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The DAFNE orbit is acquired by 4 front-end legacy Apple DEVILs (364, 365, 366, 367) and post processed by the DEVIL204DEVIL704.
The basic system elements created by the 4 front-end DEVILs are:
ORBRAK063 (364)
ORBRAK071 (365)
ORBRAK070 (366)
ORBRAK066 (367)
and the final system element created by the DEVIL204 DEVIL704 is:
GOD**001002
The DEVIL204DEVIL704, besides the two conventional GOD**001002_STA and GOD**001002_DYN forks, builds also a circular buffer some live buffers of data (containing the actual real-time X and Y orbit projections) accessible in the VME address space. To have this data also available on non-VME processors, a dedicated proxy constantly reads the GOD**001_STA and GOD**001_DYN forks, as well as the circular buffer from VME, and transfers them to memcached.
Source
[DEVIL364, 365, 366, 367] > [DEVIL204] > [Orbit_Proxy]
...
memcached.
Source
[DEVIL364, 365, 366, 367] > [DEVIL704]
Keys
| Key name | Source | Write freq. [Hz] | Data size [byte] | Throughput | Fomat | Notes | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| GOD**002_STA | DEVIL704 | - | 2624 | - | typeDef | LV cluster [LV cluster flattened to str] | |||||
GOD**002_DYN | DEVIL704 | 5.5 | 46 | 0.25 | typeDef | LV cluster [LV cluster flattened to str] | |||||
ORB-E_INFO | DEVIL704 | - | ~2500 ~2500 | - | Json document | Static description of the orbit with name, ascissa abscissa and index of each element.
| |||||
ORBE*NOD_BUF It will be ORB-E-MEAN_BUF | DEVIL704 | 5.5 | 1024 | 5.5 | LV 2D-array flattened to str (see description below) | Electrons: average(N) of the orbit (hor + ver) The N number is set by the operators via the orbit control window and can vary continuously. If you want to deal with an orbit averaged over a fixed number of samples, use the "ORB-E-USER_BUF" key instead. | |||||
ORBP*NOD_BUF It will be ORB-PORBP*NOD_BUF It will be ORB-E-MEAN_BUF | DEVIL704 | 5.5 | 1024 | 5.5 | LV 2D-array flattened to str | Positrons: average(N) of the orbit (hor + ver) The N number is set by the operators via the orbit control window and can vary continuously. If you want to deal with an orbit averaged over a fixed number of samples, use the "ORB-E-USER_BUF" key instead. | |||||
| ORB-E-ORB-E-STDDEV_BUF | DEVIL704 | 5.5 | 1024 | 5.5 | LV 2D-array flattened to str | Electrons: Std. Dev. of the orbit (hor + ver) 2 rows of 64 DBL (row 0: hor, row 1: ver) [flattened to str] 64-components array with standard deviation calculated on the last N samples. | |||||
| ORB-P-STDDEV_BUF | DEVIL704 | 5.5 | 1024 | 5.5 | LV 2D-array flattened to str | Positrons: StdPositrons: Std. Dev. of the orbit (hor + ver) 2 rows of 64 DBL (row 0: hor, row 1: ver) [flattened to str] 64-components array with standard deviation calculated on the last N samples. | |||||
| ORB-E-USER_BUF | DEVIL704 | 5.5 | ~700 | 3.9 | LV 2D-array flattened to str | Electrons: average(8) of the orbit for users (hor + ver) 2 rows of 64 DBL (row 0: hor, row 1: ver) [flattened to str] 64-components array with moving average calculated on the last 8 samples. | |||||
| ORB-P-USER_BUF | DEVIL704 | 5.5 | ~700 | 3.9 | LV 2D-array flattened to str | Positrons: average(8) of the orbit for users (hor + ver) 2 rows of 64 DBL (row 0: hor, row 1: ver) [flattened to str] 64-components array with moving average calculated on the last 8 samples. |
...
Example of LabVIEW code to use at level 1 to unflatten and extract from the 2D-array the two projections of the orbit:
When using other languages different from LabVIEW, the "unflatten from string" operator is not available; in these cases, you have to decode the 2D-array.
The 2D-array is written in memcached as two I32 numbers – that report the number of rows and the number o columns of the 2D-array – followed by a series of DBL numbers (ordered row by row). The following example, reports the 2D representation of a 2-rows, 3-cols array with the values: row 0 = [0,1,2], row 1 = [10,11,12]
| Code Block | ||||
|---|---|---|---|---|
| ||||
|< #rows >|< #cols >| a00 | a01 | a02 | a10 | a11 | a12 |
| first row | last row |
|---------|---------|-------------------|-------------------|-------------------|-------------------|-------------------|-------------------|
0000 0002 0000 0003 0000 0000 0000 0000 3FF0 0000 0000 0000 4000 0000 0000 0000 4024 0000 0000 0000 4026 0000 0000 0000 4028 0000 0000 0000 |
Map BPM Arrays
electrons
| Code Block | ||||
|---|---|---|---|---|
| ||||
[
{
"name":"BPBEL101",
"s":2.531,
"i":0
},
{
"name":"BPBEL102",
"s":6.205,
"i":1
},
{
"name":"BPBEL103",
"s":8.808,
"i":2
},
{
"name":"BPBEL104",
"s":9.803,
"i":3
},
{
"name":"BPBEL105",
"s":12.135,
"i":4
},
{
"name":"BPBEL106",
"s":13.920,
"i":5
},
{
"name":"BPBEL107",
"s":16.293,
"i":6
},
{
"name":"BPBEL108",
"s":17.184,
"i":7
},
{
"name":"BPBEL109",
"s":21.095,
"i":8
},
{
"name":"BPBEL110",
"s":24.308,
"i":9
},
{
"name":"BPBEL111",
"s":24.885,
"i":10
},
{
"name":"BPBI1001",
"s":25.455,
"i":12
},
{
"name":"BPBI1002",
"s":25.926,
"i":16
},
{
"name":"BPBES199",
"s":27.503,
"i":18
},
{
"name":"BPBES100",
"s":30.283,
"i":19
},
{
"name":"BPBES101",
"s":33.761,
"i":20
},
{
"name":"BPBES102",
"s":34.919,
"i":21
},
{
"name":"BPBES103",
"s":37.258,
"i":22
},
{
"name":"BPBES104",
"s":39.043,
"i":23
},
{
"name":"BPBES105",
"s":41.375,
"i":24
},
{
"name":"BPBES106",
"s":42.370,
"i":25
},
{
"name":"BPBES107",
"s":44.912,
"i":26
},
{
"name":"BPBES108",
"s":48.140,
"i":27
},
{
"name":"BPBES201",
"s":49.041,
"i":32
},
{
"name":"BPBES202",
"s":49.997,
"i":33
},
{
"name":"BPBES203",
"s":52.677,
"i":34
},
{
"name":"BPBES204",
"s":55.219,
"i":35
},
{
"name":"BPBES205",
"s":56.214,
"i":36
},
{
"name":"BPBES206",
"s":58.546,
"i":37
},
{
"name":"BPBES207",
"s":60.331,
"i":38
},
{
"name":"BPBES208",
"s":63.455,
"i":39
},
{
"name":"BPBES209",
"s":65.658,
"i":40
},
{
"name":"BPBES210",
"s":69.515,
"i":41
},
{
"name":"BPBEL299",
"s":74.283,
"i":49
},
{
"name":"BPBEL200",
"s":78.185,
"i":50
},
{
"name":"BPBEL201",
"s":79.361,
"i":51
},
{
"name":"BPBEL202",
"s":80.703,
"i":52
},
{
"name":"BPBEL203",
"s":83.668,
"i":53
},
{
"name":"BPBEL204",
"s":85.453,
"i":54
},
{
"name":"BPBEL205",
"s":87.786,
"i":55
},
{
"name":"BPBEL206",
"s":88.781,
"i":56
},
{
"name":"BPBEL207",
"s":91.338,
"i":57
},
{
"name":"BPBEL208",
"s":94.561,
"i":58
},
{
"name":"BPBEL209",
"s":96.228,
"i":59
}
] |
Positrons
| Code Block | ||||
|---|---|---|---|---|
| ||||
[
{
"name":"BPBPL101",
"s":2.531,
"i":0
},
{
"name":"BPBPL102",
"s":6.205,
"i":1
},
{
"name":"BPBPL103",
"s":8.808,
"i":2
},
{
"name":"BPBPL104",
"s":9.803,
"i":3
},
{
"name":"BPBPL105",
"s":12.135,
"i":4
},
{
"name":"BPBPL106",
"s":13.920,
"i":5
},
{
"name":"BPBPL107",
"s":16.293,
"i":6
},
{
"name":"BPBPL108",
"s":17.184,
"i":7
},
{
"name":"BPBPL109",
"s":21.095,
"i":8
},
{
"name":"BPBPL110",
"s":24.308,
"i":9
},
{
"name":"BPBPL111",
"s":24.885,
"i":10
},
{
"name":"BPBI1002",
"s":25.455,
"i":12
},
{
"name":"BPBI1001",
"s":25.926,
"i":16
},
{
"name":"BPBPS199",
"s":27.503,
"i":18
},
{
"name":"BPBPS100",
"s":30.283,
"i":19
},
{
"name":"BPBPS101",
"s":33.761,
"i":20
},
{
"name":"BPBPS102",
"s":34.919,
"i":21
},
{
"name":"BPBPS103",
"s":37.258,
"i":22
},
{
"name":"BPBPS104",
"s":39.043,
"i":23
},
{
"name":"BPBPS105",
"s":41.375,
"i":24
},
{
"name":"BPBPS106",
"s":42.370,
"i":25
},
{
"name":"BPBPS107",
"s":44.912,
"i":26
},
{
"name":"BPBPS108",
"s":48.140,
"i":27
},
{
"name":"BPBPS201",
"s":49.041,
"i":32
},
{
"name":"BPBPS202",
"s":49.997,
"i":33
},
{
"name":"BPBPS203",
"s":52.677,
"i":34
},
{
"name":"BPBPS204",
"s":55.219,
"i":35
},
{
"name":"BPBPS205",
"s":56.214,
"i":36
},
{
"name":"BPBPS206",
"s":58.546,
"i":37
},
{
"name":"BPBPS207",
"s":60.331,
"i":38
},
{
"name":"BPBPS208",
"s":63.455,
"i":39
},
{
"name":"BPBPS209",
"s":65.658,
"i":40
},
{
"name":"BPBPS210",
"s":69.515,
"i":41
},
{
"name":"BPBPL299",
"s":74.283,
"i":49
},
{
"name":"BPBPL200",
"s":78.185,
"i":50
},
{
"name":"BPBPL201",
"s":79.361,
"i":51
},
{
"name":"BPBPL202",
"s":80.703,
"i":52
},
{
"name":"BPBPL203",
"s":83.668,
"i":53
},
{
"name":"BPBPL204",
"s":85.453,
"i":54
},
{
"name":"BPBPL205",
"s":87.786,
"i":55
},
{
"name":"BPBPL206",
"s":88.781,
"i":56
},
{
"name":"BPBPL207",
"s":91.338,
"i":57
},
{
"name":"BPBPL208",
"s":94.561,
"i":58
},
{
"name":"BPBPL209",
"s":96.228,
"i":59
}
] |