AV4 BSMS System
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Gradient amplifier
With the introduction of the AVANCE NEO in 2017, the BSMS/2 GAB/2 has been replaced
with the AV4 GAB/2. In addition to the built-in pre-emphasis capability, which was already
available on its predecessor, the new model provides daisy chainable control (LVDS48).
Together with the extendable power supply, this allows a modular gradient amplifier
configuration in a single AV4 BSMS chassis driving up to three gradient coils (XYZ), and it is
possible to extend the gradient control chain for external gradient amplifiers (e. g. for micro
imaging).
Variable temperature control, sample handling and level monitoring
In 2010 there has been made a higher integration of the pneumatic functions for sample
handling (lift, spin), the variable temperature control (power supply and various sensor
interfacing, gas flow controls) and fill level monitoring for the magnet (helium and nitrogen
level). These functions are now provided by the SPB / SPB-E and VPSB boards, which
replace the former SLCB and PNK, the built in BVT3200 (with corresponding power supply)
or any of the stand alone BVT3000 variants.
In 2011 a digital nitrogen level sensor has been introduced together with the ASCEND family
of magnet systems.
With the introduction of the AVANCE NEO in 2017, the BSMS/2 VPSB was replaced with the
AV4 VPSB-DC or the AV4 VPSB-DC-E. Both boards take their power and control signals
directly from the backplane, no separate mains power supply and LVDS control cable are
necessary anymore.
All configurations with Standard Bore (SB) can be covered with the AV4 VPSB-DC, whereas
Wide Bore (WB) systems are equipped with an AV4 VPSB-DC-E, which includes the booster
functionality and makes the booster BVTB3500 obsolete.
Figure4.2: AV4 BSMS Chassis Rear View
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General