Biography:

One of their most recent publications is Two vernier time-interval digitizers. Which was published in journal Nuclear Instruments and Methods.

More information about R.D. Barton research including statistics on their citations can be found on their Copernicus Academic profile page.

R.D. Barton's Articles: (3)

Two vernier time-interval digitizers

AbstractTwo vernier time-interval digitizers are described. One, made of EG&G modules, has a minimum useful channel width of about 200 ps. The other, made of MECL II integrated circuitry, works at channel widths greater than 10 ps. They are inexpensive, easily made, linear, stable and fast. In many applications their digitizing rate of 20 MHz (which is variable) yields shorter total busy times than for a TAC-ADC system because of the absence of a leading dead time. For anyone with access to an on-line computer, the MECL II device reduces the cost of digitizing time intervals by more than an order of magnitude over commercially available systems and the device is so easily assembled that almost anyone can make his own. Their range of applicability is discussed and shown to cover all the practical nuclear lifetime and time of flight situations.

A versatile delayed coincidence system

AbstractA versatile delayed coincidence system is described. The apparatus incorporates new methods of time-scale calibration and walk correction, a supervisory fast coincidence, ADC's in the energy channels as well as in the time channel, and an on-line PDP-8 computer. A fairly complete description of the logic design, computer program facilities and performance is given. As evidence of satisfactory performance we report two lifetime measurements that are in excellent agreement with established values: •207Pb, first excited state: T12 = (130.2±1.5) ps;•35Cl, 4.174 MeV level: T12 = (−.5±3) ps.

A simple non-linear pulse height compensator for use with a time to amplitude converter

AbstractA simple non-linear pulse height compensator for use with a time to amplitude converter is reported. It consists of two resistances, a diode and a linear amplifier. Using a 60Co source we obtain a smooth residual walk curve with maximum time shift ≤330 ps over the upper 75% of the energy range. About 50% of the energy range is well fit by a straight line with total droop of (3 ± 3) ps from end to end. The circuit makes practical the walk corrections required in the delayed coincidence measurement of short lifetimes.

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