BY: Dr. Wolfgang Wagner

The Model MCS8A is a 80 ps per time bin, multiple-event time digitizer (TDC) with 1 start and up to 8 stop inputs. It can be used in ultra-fast Multiscaler/TOF systems, in Time-of-Flight massspectrometry and timeresolved single ion- or photon counting. Pulse-width evaluation with 80 ps precision enables the user to calculate the area, the pulse height of the detector pulse but also if multiple events have occured – multiple events have a broader pulse width than single pulses. In operation the sweep is started by a usersupplied start (trigger) pulse. Then subsequent events detected at the stop inputs are recorded, each in a specific time bin corresponding to the time of arrival relative to the start pulse. Compared to non-multi-hit devices, the MCS8A can evaluate stop events at a rate of 12.5 GHz state changes/sec, in the pulse width mode at 6.25 GHz. The USB 3.0 interface enables a permanent throughput of 240 MB/s. A version with only seven stop inputs (MCS8) is already deliverable.

Read more
BY: Dr. Wolfgang Wilhelm

The new MCA4A with USB 3 interface offers all MCA4 capabilities and has in addition a digital pole-zero filter and trapezoidal pulse shaper that enables processing of positive and negative preamplifier signals. Optional eight 125 MHz scaler/counters with 48 bit, two are presettable. The external clock input enables synchronizing several MCA4A's to expand the number of coincident channels or in MCS mode synchronizing to the experiment. Extra RTC clock reset input can be set by software to reset the clock of one or more channels to enable time spectra with respect to an external trigger signal. In addition to the standard 0...+10V / ±5V range, other ranges of 8V, 2.5 V and 2V are settable by jumpers, all can be set by software to positive / negative unipolar or positive / negative bipolar. Beside some more improvements, the USB 3 interface increases the maximum throughput by a factor of 4 compared with USB 2.0. In MCS mode the thresholds for Start, Stop1, Stop2 and Channel Advance can be set individually to any value between -2 V and +2 V.

Read more
BY: Dr. Wolfgang Wilhelm

A new firmware version FW 15.10 can be downloaded from the MCS6A and MPA4T support page. It increases the permanent event rate to fill the large 2 GB FIFO without loss from 33 MHz to 100 MHz. Three fast decoding machines work parallel to transfer the data from the 6 fast input FIFOs into the large FIFO.

Read more
BY: Dr. Wolfgang Wagner

The 2155 Pent CFT is a five-fold fully dc-coupled constant fraction discriminator with a dynamic range of up to 500:1. Selected fraction and three operating modes provide optimum time resolution for any detector types and applications. The unit accepts negative polarity pulses to the 50Ω terminated dc-coupled inputs. On customer request the module can be modified to accept positive input signals. Output signals are generated whenever the input signal exceeds the selected threshold set by a front panel potentiometer (T).

Read more
BY: Dr. Wolfgang Wilhelm

From the support pages of USB devices like MCS6A, MPA4(T), MCA4, and PCI devices like MCA-3 and P7888 now a special version of the Windows MPANT or MCDWIN software can be downloaded that can run as a Linux program under the Wine Windows emulator..

Read more