The sixteen channel CAMAC constant fraction discriminator for APEX

Maier, M R; Robertson, M; Wolfs, F L.H.; Perera, P A.A.

Title: The sixteen channel CAMAC constant fraction discriminator for APEX

Full Record
Other Related Research

Abstract

We report on the construction and the performance of a sixteen channel constant fraction discriminator (CFD) for the Atlas Positron Experiment (APEX). We have used an integrated circuit (IC), recently introduced commercially, which contains all the electronic building blocks needed to construct a CFD. We have placed 16 channels of CFD into a CAMAC module. An important feature is the time to charge converter (TQC) that we have included for every CFD channel. Its calibration constant is controlled via CAMAC. The TQC allows the use charge sensitive analog to digital converters (QDC) for timing measurements. Results for CFD walk, resolution and crosstalk as well as for TQC linearity will be presented.

Authors:

Maier, M R ^[1]; Robertson, M ^[2]; Wolfs, F L.H.; Perera, P A.A. ^[3]

Lawrence Berkeley Lab., CA (United States)
National Superconducting Cyclotron Lab., East Lansing, MI (United States)
Rochester Univ., NY (United States). Nuclear Structure Research Lab.

Publication Date:: Fri Nov 01 00:00:00 EST 1991

Research Org.:: Lawrence Berkeley Lab., CA (United States)

Sponsoring Org.:: USDOE; USDOE, Washington, DC (United States)

OSTI Identifier:: 5566101

Report Number(s):: LBL-31450; CONF-911106-90
ON: DE92010550

DOE Contract Number:: AC03-76SF00098

Resource Type:: Conference

Resource Relation:: Conference: IEEE nuclear science symposium, Santa Fe, NM (United States), 5-9 Nov 1991

Country of Publication:: United States

Language:: English

Subject:: 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 42 ENGINEERING; DISCRIMINATORS; PERFORMANCE TESTING; HEAVY ION REACTIONS; PAIR PRODUCTION; CAMAC SYSTEM; DESIGN; INTEGRATED CIRCUITS; RESOLUTION; CHARGED-PARTICLE REACTIONS; ELECTRONIC CIRCUITS; INTERACTIONS; MICROELECTRONIC CIRCUITS; NUCLEAR REACTIONS; PARTICLE PRODUCTION; TESTING; 440103* - Radiation Instrumentation- Nuclear Spectroscopic Instrumentation; 426000 - Engineering- Components, Electron Devices & Circuits- (1990-)

Citation Formats


                    Maier, M R, Robertson, M, Wolfs, F L.H., and Perera, P A.A. The sixteen channel CAMAC constant fraction discriminator for APEX.  United States: N. p., 1991. 
        Web.

Copy to clipboard


                    Maier, M R, Robertson, M, Wolfs, F L.H., & Perera, P A.A. The sixteen channel CAMAC constant fraction discriminator for APEX.  United States.

Copy to clipboard


                    Maier, M R, Robertson, M, Wolfs, F L.H., and Perera, P A.A. 1991.  
        "The sixteen channel CAMAC constant fraction discriminator for APEX".  United States.  https://www.osti.gov/servlets/purl/5566101.

Copy to clipboard


                    
@article{osti_5566101,

  title        = {The sixteen channel CAMAC constant fraction discriminator for APEX},

  author       = {Maier, M R and Robertson, M and Wolfs, F L.H. and Perera, P A.A.},

  abstractNote = {We report on the construction and the performance of a sixteen channel constant fraction discriminator (CFD) for the Atlas Positron Experiment (APEX). We have used an integrated circuit (IC), recently introduced commercially, which contains all the electronic building blocks needed to construct a CFD. We have placed 16 channels of CFD into a CAMAC module. An important feature is the time to charge converter (TQC) that we have included for every CFD channel. Its calibration constant is controlled via CAMAC. The TQC allows the use charge sensitive analog to digital converters (QDC) for timing measurements. Results for CFD walk, resolution and crosstalk as well as for TQC linearity will be presented.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/5566101},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Fri Nov 01 00:00:00 EST 1991},

  month        = {Fri Nov 01 00:00:00 EST 1991}

}

Copy to clipboard

Conference:

View Conference (0.85 MB)

Other availability

Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

The sixteen channel CAMAC constant fraction discriminator for APEX

Conference Maier, M; Robertson, M; Wolfs, F; ...

We report on the construction and the performance of a sixteen channel constant fraction discriminator (CFD) for the Atlas Positron Experiment (APEX). We have used an integrated circuit (IC), recently introduced commercially, which contains all the electronic building blocks needed to construct a CFD. We have placed 16 channels of CFD into a CAMAC module. An important feature is the time to charge converter (TQC) that we have included for every CFD channel. Its calibration constant is controlled via CAMAC. The TQC allows the use charge sensitive analog to digital converters (QDC) for timing measurements. Results for CFD walk, resolutionmore »« less
Full Text Available
Electronics for the Si detectors in APEX

Conference Wilt, P; Betts, R; Freer, M

APEX (ATLAS Positron EXperiment), a collaborative effort of ANL, FSU, MSU/NSCL, Princeton, Queen`s, Rochester, Washington and Yale, is an experiment to study positron and electron production in very heavy ion collisions. The electrons and positrons are detected with two detector arrays, each consisting of 216 1 mm thick Si PIN diodes, and their energy and time-of-flight are measured. The number of detectors and limited space made it necessary to develop a system that could efficiently process and transfer signals from the detectors to the charge sensing ADC`s and data readout electronics as well as monitor the condition of the detectors.more »« less
Full Text Available
A monolithic, 2. mu. m CMOS constant-fraction discriminator for moderate time resolution systems

Journal Article Binkley, D; Simpson, M; Rochelle, J - IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States)

This paper reports on a monolithic, 2 {mu}m CMOS constant-fraction discriminator (CFD) that was developed for use with moderate time resolution (about 4 ns FWHM) scintillation detectors such as BGO. The circuit was fabricated through the metal-oxide-semiconductor implementation service (MOSIS) using a double-metal, double- polysilicon digital process. The measured CFD walk is 1.4 ns total for input signals of {minus}200 to {minus}2000 mV with risetimes of 20 ns. Additionally, the measured CFD noise jitter is 70 ps FWHM for {minus}200 mV, 20 ns risetime signals. Measured timing performance of the CFD circuit with a BGO scintillation detector shows good performancemore »« less
https://doi.org/10.1109/TNS.1991.574225
Electronics for the APEX silicon array

Journal Article Perera, P - Bulletin of the American Physical Society

APEX uses 432 Si PIN diodes to measure the energy and time of flight of electrons and positrons. Each detector connects to a fast-slow preamplifier (PA). Thirty-six PAs mount on one motherboard that distributes the input and output signals and monitors detector voltage and leakage currents. An 8-channel Shaping Amplifier (SA) shapes and amplifies the slow signal from the preamplifier. A 16-channel Peak-to-FERA Converter (PTF) stretches the output signal of the SA. A Fast-Encoding & Readout ADC (FERA) digitizes the stretched signal. A 16-channel Fast Amplifier (FA) amplifies the fast timing signal from the preamplifier. The amplified signal triggers amore »« less
A monolithic, constant-fraction discriminator using distributed R-C delay line shaping

Journal Article Simpson, M; Young, G; Jackson, R; ... - IEEE Transactions on Nuclear Science

A monolithic, CMOS, constant-fraction discriminator (CFD) was designed and fabricated in a 1.2-{micro}, N-well process. This circuit used an on-chip, distributed R-C delay line to realize the constant-fraction shaping. The delay line was constructed of a 4.8-{micro} wide, 500-{micro} long serpentine layer of polysilicon above a grounded second layer of polysilicon. This line generated about 1.1 ns of delay for a 5-ns risetime signal with a slope degradation of only 15%. The CFD also featured dc feedback for both the arming and zero-crossing discriminators to eliminate timing errors caused by offsets. The entire circuit, including the delay line, required anmore »« less
https://doi.org/10.1109/23.507173

Similar Records