epics ioc using windowsxp based oscilloscope for bpm daq system in kek e e linac
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EPICS IOC using WindowsXP-based Oscilloscope for BPM DAQ System in KEK e-/e+ Linac. Masanori Satoh (KEK Linac) June 13-16, 2011 EPICS Collaboration Meeting in NSRRC. KEK e-/e+ Linac and Operation. Lepton Accelerator Complex in KEK Tsukuba Site.

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epics ioc using windowsxp based oscilloscope for bpm daq system in kek e e linac

EPICS IOC using WindowsXP-based Oscilloscope for BPM DAQ Systemin KEK e-/e+ Linac

Masanori Satoh (KEK Linac)

June 13-16, 2011

EPICS Collaboration Meeting in NSRRC

M. Satoh/ KEK Linac Control

kek e e linac and operation
KEK e-/e+ Linacand Operation

M. Satoh/ KEK Linac Control

slide3

Lepton Accelerator Complex in KEK Tsukuba Site

  • Injector Linac: 8 GeV e-/3.5 GeV e+, 50 Hz, 0.1~10 nC
  • KEKB : 8 GeV e-/1400 mA, 3.5 GeV e+/2000 mA
  • PF: 2.5 GeV e-/450 mA
  • PF-AR: 6.5 GeV e-/60 mA
  • SuperKEKB : 7 GeV e-, 4 GeV e+ 2014 ~
  • KEKB : Shutdown in June 2010
slide4

PF

Simultaneous Top-up for 3 rings

  • Beam current stability since Apr. 2009- KEKB e-/e+: 1 mA (~ 0.05%) : e-: 12.5 Hz, e+: 25 Hz
  • - PF: 0.05 mA (~ 0.01%) : 0.5 Hz

KEKB e-

KEKB e+

Luminosity

M. Satoh/ KEK Linac Control

bpm and old daq system
BPM andOld DAQ System

M. Satoh/ KEK Linac Control

linac bpm system
Linac BPM System
  • BPM x 100 for 600-m-long Linac
    • Stripline-type (four electrodes)
    • Position and Charge

measurement

    • Orbit and Energy

Feedback

  • DAQ System
    • x 20 DAQ Stations

(One DAQ station typically handle BPMx4)

    • Digital Oscilloscope and VME CPU

M. Satoh/ KEK Linac Control

slide7

Oscilloscope (Tektronix TDS680B)

  • VME CPU (OS-9/ MC68060 50 MHz)
  • 5 GSa/s, 8bits, 2ch, 1 GHz BW, GPIB(low noise immunity)
  • DAQ rate:~1 Hz

Vy1

Vy2

Vx2

Vx1

M. Satoh/ KEK Linac Control

analogue signal from bpm kekb e
Analogue signal from BPM (KEKB e-)

7 ns

M. Satoh/ KEK Linac Control

orbit display panel sad tk

Orbit and Energy FB

Orbit Display Panel (SAD/Tk)

HLA layer

Middle server layer

BPM DAQ layer

M. Satoh/ KEK Linac Control

new system windowsxp based oscilloscope
New System(WindowsXP-based Oscilloscope)

M. Satoh/ KEK Linac Control

bpm daq upgrade
BPM DAQ Upgrade
  • Difficulty of maintenance (Old oscilloscope/VME)
  • Fast DAQ is strongly required (50 Hz) for simultaneous top-up operation
  • Hardware replacement in summer 2007
  • Software upgrade => EPICS IOC in summer 2008

M. Satoh/ KEK Linac Control

slide12

WindowsXP-based Oscilloscope (Tektronix DPO7104)

  • 10 GSa/s, 8bits, 4ch, 1 GHz BW, Ethernet connection
  • DAQ rate:> 50 Hz
  • EPICS IOC running on Oscilloscope (R3.14.9)

0.1/1 nC

(200 mV/div)

10 nC (1 V/div)

M. Satoh/ KEK Linac Control

oscilloscope performance
Oscilloscope performance

M. Satoh/ KEK Linac Control

epics pv name example
EPICS PV Name Example
  • LIiBM:SP_A1_B8_1:XSNGL:KBE
  • LIiBM:BPM name:Property:Beam mode
  • Beam mode
    • KBE (KEKB e-)
    • KBP (KEKB e+)
    • PFE (PF e-)
    • ARE (PF-AR e-)
    • and more (Study mode for each beam)

M. Satoh/ KEK Linac Control

synchronization w beam mode
Synchronization w/ Beam mode

EPICS PV name @ Event generator

  • It works well, so far
  • When network traffic is increased, …?

M. Satoh/ KEK Linac Control

slide16

(Python)

PF

KEB e-

KEB e+

HLA layer

Blade server

NAS

Archiver

Middle server layer

BPM DAQ x 24

(Win.XP Scope. EPICS IOC)

M. Satoh/ KEK Linac Control

summary and future plan
Summary and Future Plan
  • The new BPM DAQ system has been developed:
    • EPICS IOC (WindowsXP-based digital oscilloscope)
    • Old system (20) has been replaced by new one (24)
    • Successful in stable beam position measurement (50 Hz)
    • Similar system was adopted for BPM DAQ of KEKB-BT
  • Towards to SuperKEKB injector upgrade:
    • Higher resolution (100 mm -> 10 mm?)
    • Several candidates are now under consideration
      • Libera Briliance Single Pass?
      • VME-based new one?

M. Satoh/ KEK Linac Control

thank you for your attention
Thank you for your attention!

M. Satoh/ KEK Linac Control

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