U.S. ATLAS HL-LHC Upgrade Level 2 and Deputies-NSF only Management Mailing List

["Zhang, Jinlong" <zhangjl AT anl.gov>]

Hi All,

I would guess that it should be related to the NSF scope

-- L1Track Hardware + firmware 

    -- ~50% TPs --> ~$1M (assuming ~1/3 of AMTPs moved to L1Track, because rHTT not needed with L1Track)

    -- firmware???  - no model here but maybe half of the planned firmware for the baseline --> $1M

I am not sure can follow the logic here. As historically discussed in quite a bit details, the total TT processing hardware in L0/L1 vs L0 only should not be much different except increasing I/O components(1 MHz to 4 MHz). If L1Track is introduced as in the
 L0/L1, the EF part of HTT in such a scenario will do less tracking work therefore the total TP boards needed for EF part should be smaller than the HTT in L0 only situation; so I am not sure 50% more TPs for L1Track is a proper number comparing the baseline
 scenario;

For firmware, the key changes needed for L1Track is the data preparation, which is in either in Felix on HTTIF equivalent. So again I am not sure 50% more firmware in TP is reasonable.

Cheers,

Jinlong