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

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

We have developed a new time calibration method for DRS4 waveform sampler. The method is based on the correlation between differential amplitude and time interval of adjacent switched-capacitor cells responding to a simple saw-tooth shape pulses. In the experiment, saw-tooth pulse with 40ns period from a Tektronix AWG7104 is fed to DRS4 evaluation board for calibrating all 1024 cells of the board. The electronic time resolution of the DRS4 board with the new time calibration is measured to be ~5.6ps FWHM using two identical simulataneous Gaussian pulses. The time resolution dependencies on the delay and the sampling speed are measured also. The new method is applicable for other switched-capacitor array technology-based waveform samplers for precise time calibration.

[1] Chien-Min Kao,et al. A Prototype TOF PET Detector Module Using a Micro-Channel Plate Photomultiplier Tube with Waveform Sampling. , 2012 .

[2] Roberto Dinapoli,et al. Application of the DRS chip for fast waveform digitizing , 2010 .

[3] G. G. Stokes. "J." , 1890, The New Yale Book of Quotations.

[4] E. Delagnes,et al. High resolution photon timing with MCP-PMTs: A comparison of a commercial constant fraction discriminator (CFD) with the ASIC-based waveform digitizers TARGET and WaveCatcher , 2010, IEEE Nuclear Science Symposuim & Medical Imaging Conference.

[5] Eric Delagnes,et al. SAM: A new GHz sampling ASIC for the H.E.S.S.-II front-end electronics , 2006 .

[6] Larry L. Ruckman,et al. The first version buffered large analog bandwidth (BLAB1) ASIC for high luminosity collider and extensive radio neutrino detectors , 2008, 0802.2278.

[7] E. Oberla,et al. A 15 GSa/s, 1.5 GHz bandwidth waveform digitizing ASIC , 2013, 1309.4397.

[8] K. Nishimura,et al. A Correlation-based Timing Calibration and Diagnostic Technique for Fast Digitizing ASICs , 2012 .