introduction
DESCRIPTION
BPM DAQ Software Structure. VME. Oscilloscope. Cable Combiner BOX. New BPM DAQ System has been developed by a fast digital oscilloscope (Tektronix DPO7104) All DAQ Systems have been replaced by New Systems Performance of New DAQ System is enough for 50-Hz measurement. Summary. - PowerPoint PPT PresentationTRANSCRIPT
Fast BPM DAQ System Using Windows Oscilloscope-based EPICS IOCM. Satoh, T. Suwada, K. Furukawa
Accelerator Laboratory, KEK, Oho 1-1, Tsukuba, Ibaraki, 305-0801 JapanJian Wang
Department of Modern Physics, Univ. Sci. & Tech. ChinaHefei 230026, ChinaT. Kudou, S. Kusano
Mitsubishi Electric System & Service Co., Ltd, Tsukuba, Japan
Introduction
・ KEK Linac is a injector:(1) KEKB HER 8 Gev e-/ 3.5 Gev e+ (Continuous injection Mode: CIM)(2) KEKB LER 3.5 GeV e+ (CIM)(3) PF 2.5 Gev e- (once/day) => Top-up(4) PF-AR 3 GeV e- (twice/day)・ For long-term stable beam operation:Needs Beam Orbit and Energy ControlWe use about 100 of non-destructive BPMs for the orbit
and energy feedback.
・ Fast Beam-Mode Switch for KEKB CIM and PF Top-up=> Needs Beam Position Measurement up to 50-Hz
Result of Performance Test
Summary
• New BPM DAQ System has been developed by a fast digital oscilloscope (Tektronix DPO7104)•All DAQ Systems have been replaced by New Systems•Performance of New DAQ System is enough for 50-Hz measurement.
VME#2 VME#20
BPM Data (x,y,i, ...)
VME#1
Sharedmemory
Oscillo. data(V-range,etc.)
Waveform read-out from oscilloscope Data processing O sc illo sco p e
co n tro l
Write Read
send recvRead Write
UNIX server
recv send
UDP protocol
Sharedmemory for #1 for #20for #1 for #20
Write Read
UNIXWindows/PCLinux/PCTouch-terminal
BPM Application BPM
Application
BPM Application
Write
Read
Read
Tcl/Tk, Python, Visual Basic......
TCP protocol
BPM DAQ Software Structure
0 2 4 6 8 100
50
100
150
200
250
300
350
DA
Q r
ate
[Hz]
Number of data points [k]
1ch 2ch 3ch 4ch
Local access
0 2 4 6 8 100
50
100
150
200
250
300
350
DA
Q r
ate
[Hz]
Number of data points [k]
1ch 2ch 3ch 4ch
Remote access (Ethernet/ VXI-11)
Waveform acquisition speed of a fast digital oscilloscope was tested. (Remote/ Local test: Software is running on host computer/ oscilloscope)
Both test results is enough for our purpose (50-Hz measurement).
DAQ Rate by EPICS-IOC is also enough fast.
VME
Oscilloscope
Cable Combiner BOX
Previous BPM DAQ System (1-Hz)
Monitor Station
Cable Combiner Box
Linac Tunnel
Klystron Gallery
BPM
8ch-Combiner 8ch-Combiner
*
* Delay Cable (7-ns)
Digital Oscilloscope (5GS/s)
y x GPIB
VME/ OS9
Linac NetworkMonitor Station
Cable Combiner Box
Linac Tunnel
Klystron Gallery
BPM
8ch-Combiner 8ch-Combiner
*
* Delay Cable (7-ns)
Fast Digital Oscilloscope (10GS/s)y x
Linac Network
Windows XP
EPICS
New BPM DAQ System (> 50-Hz)
EPICS Record Design by VDCT
•Development of IOC for beam operation•Development of Device Support including all Oscilloscope Functions• Realization of Synchronized Beam Orbit Measurement among all twenty-five DAQ Systems
Future Issue
50 100 150 200 250 300 350 400 450 5000
50
100
150
200
250
300
350
DA
Q S
pe
ed
[Hz]
Data length[k-points]
Ch4 Ch3 Ch2 Ch1
DAQ Performance by EPICS-IOC
Replaced!Replaced!