Seminar zur Teilchenphysik, SS 2011
Donnerstag, 12.5.2011, 16:30Uhr, D10.08
Dr. Katja Klein
RWTH Aachen
Novel powering schemes for the upgrade of the CMS tracker
The CMS experiment foresees upgrades of its silicon pixel and strip
detectors for the luminosity upgrade of the LHC. Due to an increase in
the number of readout channels and higher complexity larger currents
will have to be provided to the detector. Since cable channels are
hardly accessible and space for cables is limited, this would lead to
excessively large resistive power losses in the supply cables, which
increase with the current squared. CMS has therefore chosen a novel
powering scheme based on DC-DC converters, which allows to deliver the
power at a higher voltage and consequently lower current.
Based on radiation-tolerant DC-DC buck converter ASICs from the CERN
electronics group, we develop low-mass, low-noise DC-DC converters for
the application in CMS. The talk will cover studies of switching noise,
magnetic emissions and power efficiency as well as system tests with
silicon strip and pixel modules. A scheme for the integration of DC-DC
converters in the silicon pixel detector, currently foreseen to be
exchanged around 2016, will be presented.
 Slides
gez. D. Wicke
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