A new time calibration method for switched-capacitor-array-based waveform samplers

Journal Article · Sun Aug 24 00:00:00 EDT 2014 · Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

DOI:https://doi.org/10.1016/j.nima.2014.08.025· OSTI ID:1413094

Kim, H. ^[1]; Chen, C. -T. ^[1]; Eclov, N. ^[1]; Ronzhin, A. ^[2]; Murat, P. ^[2]; Ramberg, E. ^[2]; Los, S. ^[2]; Moses, W. ^[3]; Choong, W. -S. ^[3]; Kao, C. -M. ^[1]

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1. Univ. of Chicago, Chicago, IL (United States)
2. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Here we have developed a new time calibration method for the DRS4 waveform sampler that enables us to precisely measure the non-uniform sampling interval inherent in the switched-capacitor cells of the DRS4. The method uses the proportionality between the differential amplitude and sampling interval of adjacent switched-capacitor cells responding to a sawtooth-shape pulse. In the experiment, a sawtooth-shape pulse with a 40 ns period generated by a Tektronix AWG7102 is fed to a DRS4 evaluation board for calibrating the sampling intervals of all 1024 cells individually. The electronic time resolution of the DRS4 evaluation board with the new time calibration is measured to be ~2.4 ps RMS by using two simultaneous Gaussian pulses with 2.35 ns full-width at half-maximum and applying a Gaussian fit. The time resolution dependencies on the time difference with the new time calibration are measured and compared to results obtained by another method. Ultimately, the new method could be applicable for other switched-capacitor-array technology-based waveform samplers for precise time calibration.

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP); National Institutes of Health (NIH)
• Grant/Contract Number: AC02-07CH11359; R01EB016104; T32EB002103
• OSTI ID: 1413094
• Alternate ID(s): OSTI ID: 1282050
• Report Number(s): FERMILAB-PUB-14-616-E; 1624633; TRN: US1800413
• Journal Information: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 767, Issue C; ISSN 0168-9002
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
Waveform sampling
Time calibration
Switched-capacitors
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
Waveform Sampling
Time Calibration
Switched-Capacitors