002745895 001__ 2745895
002745895 005__ 20201130110731.0
002745895 0248_ $$aoai:cds.cern.ch:2745895$$pcerncds:FULLTEXT
002745895 037__ $$aCERN-ACC-NOTE-2020-0060
002745895 041__ $$aeng
002745895 100__ $$0AUTHOR|(SzGeCERN)643416$$0AUTHOR|(CDS)2068353$$aBradu, [email protected]$$uCERN
002745895 245__ $$aDynamic simulations and transient management of the HL-LHC cryogenic system during beam operation
002745895 260__ $$c2020
002745895 269__ $$aGeneva$$bCERN$$c16 Nov 2020
002745895 300__ $$a36 p
002745895 520__ $$aThis paper presents a set of dynamic simulations performed on the future High Luminosity Large Hadron Collider (HL-LHC) cryogenic system. The objectives of these simulations are to provide main pressure, temperature and flow transients over the cryogenic distribution system around the collision points 1 and 5 during the forecast beam operation. These simulations have to be used to help the different cryogenic system specifications where strong dynamic heat loads will induce significant transient modes. This dynamic model embeds the 1.9 K cooling loops (inner triplets, D1-D2 magnets and crab cavities), the beam screen cooling loops between 60 K and 80 K or between 4.5 K and 20 K and the cryogenic distribution line. As result, a series of recommendations is given to mitigate sufficiently the transients such as the use of significant preloading of magnets in association with feed-forward controls.
002745895 595__ $$aCERN EDS
002745895 595__ $$zUNCL
002745895 65017 $$2SzGeCERN$$aAccelerators and Storage Rings
002745895 6531_ $$9CERN$$aCERN HL-LHC
002745895 6531_ $$9CERN$$aHiLumi LHC
002745895 6531_ $$9CERN$$aCryogenics
002745895 6531_ $$9CERN$$aSystems Engineering
002745895 690C_ $$aCERN
002745895 690C_ $$aINTNOTE
002745895 690C_ $$aPUBLATS
002745895 693__ $$aCERN LHC
002745895 693__ $$pCERN HL-LHC
002745895 710__ $$5ATS
002745895 710__ $$aCERN. Geneva. ATS Department
002745895 859__ [email protected]
002745895 8564_ $$82266496$$s8248259$$uhttp://cds.cern.ch/record/2745895/files/CryoSimu_HL_LHC.pdf$$yAccess to fulltext
002745895 916__ $$sn$$w202048
002745895 937__ $$c30 Nov [email protected]
002745895 960__ $$a12
002745895 963__ $$aPUBLIC
002745895 980__ $$aINTNOTEATSPUBL
002745895 980__ $$aNOTE
002745895 980__ $$aTECHNOTE
002745895 993__ $$qOperations Management
002745895 993__ $$tCryogenics
002745895 993__ $$qComputed Aided Engineering