Page History
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- Need to buy a big node (like hsd node) to hold 6 kcu cards
- dionisio says this mtp24 is only available in multimode: https://www.mouser.com/ProductDetail/Amphenol-FSI/10124588-310?qs=81r%252BiQLm7BSk9m%252B2puhj7Q%3D%3D.
- see also https://www.amphenol-cs.com/product-series/leap-on-board-transceiver.html
- see also https://www.amphenol-cs.com/optics/transceivers.html
- amphenol tells us to contact our local sales rep: Gaurav.Singh@amphenol-fci.com
- feedthroughs may also be a problem. Kaz is getting part number RETA-RIB-CF40-24-GI50-025-S70-MTPF (24 fibers) and RETA-RIB-CF16-12-GI50-025-S48-MTPF (12 fibers) from sedi-ati.com. These two parts are similar to RETA-STANF21.208 (different length) and RETA-LBNL19.141 (different flange). Looks like feedthroughs are available in single-mode!
- transceiver outputs MPO24 (12 fiber pairs). the vacuum feedthroughs will also be MPO24
- timing comes from XPM. configuration/monitoring/data fibers connect to DRP. we will use LC plus cassettes to get to MPO24 (and MPO8 going to the multimode to single mode converters).
- need to have/order:
- a node to hold all the multimode-to-single-mode converter KCUs
- LC to MPO24 cassettes
- MPO8 breakout cables
Amphenol says these are "variants" of the transceiver that they support:
SZ Compression
Chuck writes about roibinsz:
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This 71ms number + 20ms for calibration feels tight on 10 nodes. Implies 10Hz per core, or 500 cores (8 nodes)
This paper compares CPU/GPU SZ compression: https://arxiv.org/abs/2007.09625. It states 370x improvement on GPU vs 1 CPU core. If we have 60 usable cores on a DRP node, that makes a GPU-SZ node the equivalent of 6x faster than a CPU-SZ node.
Schedule
(on Dec. 19, 2022) Sometime in February/March a prototype with 3 tiles will be released (could generate fake data for missing panels for 1 quad). Full detector: summer?
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Overview
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