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In planning for the Phase II upgrades of CMS and ATLAS major considerationsare: 1)being able to deal with degradation of tracking and calorimetry up tothe radiation doses to be expected with an integrated luminosity of 3000$fb^{-1}$ and 2)maintaining physics performance at a pileup level of ~140. HereI report on work started within the context of the CMS Forward Calorimetry TaskForce and continuing in an expanded CERN RD52 R$&$D program integrating timing(i.e. measuring the time-of-arrival of physics objects) as a potential tool forpileup mitigation and ideas for Forward Calorimetry. For the past 4 years ourgroup has focused on precision timing at the level of 10-20 picoseconds in anenvironment with rates of $~10^6-10^7$ Hz/$cm^2 $ as is appropriate for thefuture running of the LHC (HL-LHC era). A time resolution of 10-20 picosecondsis one of the few clear criteria for pileup mitigation at the LHC, since theinteraction time of a bunch crossing has an rms of 170 picosec. While work oncharged particle timing in other contexts (i.e. ALICE R$&$D) is starting toapproach this precision, there have been essentially no technologies that cansustain performance at these rates. I will present results on a tracker wedeveloped within the DOE Advanced Detector R$&$D program which is now meetingthese requirements. I will also review some results from Calorimeter Projectsdeveloped within our group (PHENIX EMCAL and ATLAS ZDC) which achievedcalorimeter timing precision< 100 picoseconds.

Experimental Challenges of the European Strategy for Particle Physics