llrf tuning system results
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LLRF Tuning System Results. By Saad AlSari SEP 22 th 2010. ESS-Bilbao Tuning System. System Overview. - PowerPoint PPT PresentationTRANSCRIPT
LLRF Tuning System Results
BySaad AlSari
SEP 22th 2010
ESS-Bilbao Tuning System•System Overview
The system parts been set up in Imperial College with the signal generator and high power amplifier in the input end and the stepper motor drive, the RFQ tuner on the RFQ could model from the other end.
System performing amplitude, phase and tuning control.
The LLRF system includes three feedback loops to regulate the amplitude and phase of the RFQ field as well as the RFQ resonance frequency.
The equipments worked without modifications apart from optimizing settings of the LLRF parameters using the provided GUI input settings.
ESS-Bilbao Tuning SystemSystem Setup
A laptop with PCI Express port interface would be needed in the current Matlab control terminal.
•The FPGA interface with the laptop might malfunction if any of these requirements is not met:
• Manufacturer: Dell or Hewlett Packard (HP)• Operating System: Microsoft Windows XP Professional• Service Pack 2• Express Card for compact PCI connection
ESS-Bilbao Tuning SystemSystem Results
Main Parameters Date: 6, 7 September 2010
Pulse Parameters:
PARAMETER Specification Low Power Test 60 Watt Test UNIT NOTE
Pulse frequency 50 49.64 49.64 Hz
Pulse width 2 1.989 1.989 ms
Duty cycle 10 9.873 9.873 %
Settling time <100 7 86 us
RFQ cold model Parameters:
PARAMETER Specification Measured UNIT NOTE
fcav 324 320.35 MHz
Tuning range 1 app. MHz with 4 tuners
Q (unloaded) measured 9000 7773
LLRF Parameters:
PARAMETER Specification Low Power Test 60 Watt Test UNIT NOTE
Operation mode CW / pulsed CW / pulsed CW / pulsed
Settling time <100 <100 <100 usdepends on PI gain Adjustments
ESS-Bilbao Tuning SystemSystem Results• System operated in pulsed mode (pulse rate = 50 Hz, pulse width = 2 ms)
LOW POWER TESTS 60 WATTS TESTS
•Fig. 1:Pulse parameters : Measured cavity field and Sink of 50 Hz
•Fig. 1:Pulse parameters : Measured cavity field and Sink of 50 Hz
ESS-Bilbao Tuning SystemSystem Results• System operated in pulsed mode (pulse rate = 50 Hz, pulse width = 2 ms)
LOW POWER TESTS 60 WATTS TESTS
•Fig. 2 :Settling time of measured cavity field •Fig. 2 :Settling time of measured cavity field
ESS-Bilbao Tuning SystemSystem Results• System operated in pulsed mode (pulse rate = 50 Hz, pulse width = 2 ms)
LOW POWER TESTS 60 WATTS TESTS
•Fig. 3: CW operation . Measured cavity field and reference signal (generator output)
•Fig. 3: CW operation . Measured cavity field and reference signal (generator output)
ESS-Bilbao Tuning SystemSystem Results• System operated in pulsed mode (pulse rate = 50 Hz, pulse width = 2 ms)
60 WATTS TESTS
•Fig. 4: Measured cavity field and reflected power
ESS-Bilbao Tuning SystemSystem Results• System operated in pulsed mode (pulse rate = 50 Hz, pulse width = 2 ms)
LOW POWER TESTS
ESS-Bilbao Tuning SystemSystem Results• System operated in pulsed mode (pulse rate = 50 Hz, pulse width = 2 ms)
60 WATTS TESTS