The Mod. A422A is a charge sensitive preamplifier, designed to be used especially with semiconductor detectors and in particular whenever the charge division is required (as in position sensitive silicon detectors). The unit accepts both positive and negative input pulses. A Test input for detector gain calibration and a HV input (up to 5 kV) for the detector bias are also included.
The output is an inverting unipolar voltage pulse, proportional in amplitude to the integrated charge; decay time is 300 µs. A Timing output provides a unipolar inverting fast voltage pulse, with a 15 ns typical rise time, across a 50 Ohm load. Three different sensitivities (5, 30 or 60 mV/MeV) can be selected.
The Mod. is an housed in a one unit wide NIM module. The module accepts 8 negative inputs and produces (NIM outputs are provided with a fan-out of two)+ (negated) on front panel LEMO 00 connectors.
The constant fraction delay is with 4 ns steps (8 ÷ 20 ns operating range), optionally are also available:
The is a implemented in a one unit wide NIM module. It accepts the typical outputs generated from either optical feedback or resistor feedback preamplifiers connected with nuclear particle detectors. The output is quasi Gaussian with output dynamics.
A front panel switch allows to select between positive and negative input signals. Gain setting can be performed continuously in the range, product of Coarse, Fine and Superfine Gain. Two internal jumpers allow to set a attenuation and a further amplification, thus extending the gain range to . The shaping time values are µs.
The Mod. N405 is a one unit wide NIM module housing three independent sections that can be used either as logic unit or majority. The two modes are selectable via internal DIP switches.
Each section accepts 4 input signals, a VETO input and provides 4 outputs (2 normal and 1 complementary, shaped, plus 1 linear). The linear output provides a signal whose width is equal to the time during which the input signals satisfy the conditions programmed via the front panel lever switches. The shaped output widths can be set via front panel trimmers in the range 6 ns to 800 ns.
LOGIC UNIT MODE
The Mod. N93 B is a one unit NIM module housing two identical triggered pulse generators.
The module produces NIM and ECL pulses whose width ranges from 50 ns to 10 s when triggered. Output pulses are provided normal and complementary.
Timers can be re-triggered with the pulse end marker signal.
The coarse adjustment of the output width is provided via a 10-position rotary switch, the fine adjustment can be performed via a rotary handle.
The trigger START can be provided either via an external signal or manually via a front panel switch.
The Mod. V1785 is a 1-unit wide VME 6U module housing 8 Peak Sensing Analog-to-Digital Conversion channels. Each channel is able to detect and convert the peak value of the positive analog signals (with >50 ns risetime) fed to the relevant connectors. Input voltage range is 0 ÷ 4 V. Each channel is processed by two gain stage (x1 and x8) in parallel followed by the ADC stage: a dual input range is then featured: 0 ÷ 4 V (1 mV LSB) and 0 ÷ 500 mV (125 μV LSB); this allows to avoid saturation with big input signals while increasing resolution with small ones.
The ADCs use a sliding scale technique in order to reduce the differential non-linearity.
Programmable zero suppression, multievent buffer memory, trigger counter and test features complete the flexibility of the unit.
The V2718 is a VME to PCI Optical Link Bridge, housed in a 1-unit wide VME 6U module. The unit acts as a VME Master module and can be controlled by a standard PC equipped with PCI or PCIe CAEN Controller cards (Models A2818 and A3818). The connection between the V2718 and the Controller takes place through an optical fibre cable (AI2700 – Optical Fiber Series). Multi-crate sessions can be easily performed, since up to eight daisy chained V2718 (via optical fibre cables) can be controlled by a single A2818/A3818, thus building a CONET (Chainable Optical Network).
The Mod. is a card that can plug into both PC PCI Express slot (V1.1 or higher), which allows the control of up to independent networks (each network can be made of up to 8 CONET2 slaves).
CONET2 is an optical link based network with Daisy chain capabilities. Through the CONET2 it is possible to handle the VMEbus through the CAEN VMEbus Optical Link Bridges (such as the V2718) or to control directly CAEN modules with built-in optical link (such as the N67xx, DT57xx and V17xx digitizers).
The Model VME8008B is a 8 slot VME crate, suitable for 6U x 160mm boards, with VME64 compliant backplane. The Unit is powered by 100 – 240 Vac (50 – 60 Hz). The power distribution is 50A@+5V, 10A@+12V, 10A@-12V. The VME8008 provides Automatic daisy chain and supports Chained Block Transfer (CBLT).
– Single width (5 TE wide), 24 channel (Mod. A1550).
– Single width (5 TE wide), 12 channels (Mod. A1550D), – Double width (10 TE wide), 24 channels (Mod. A1550S)