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# Weight analysis of the new TPC geometry

Using the TGeoVolume::Weight() method, examine the mass of the main TPC volume and the sub volumes. What we see is that there is a big mismatch between the analytic and sampled masses in TSWH (the sector + wheel whole assembly). This amounts to 20% of the total mass of the TSWH volumes in TPCE. This is a difference of 24 * ( 234.09 kg - 196.768 kg) = 895.7 kg. The problem is localized to TSHW.

xx Volume: TPCE analytic=5942.111 kg sampled=4380.262 kg

=========================================================

xx Volume: TPCM analytic= 1.254 kg sampled= 1.257 kg

xx Volume: TIFC analytic= 64.509 kg sampled= 64.616 kg

xx Volume: TOFC analytic= 234.090 kg sampled= 234.850 kg

xx Volume: TSWH analytic= 235.094 kg sampled= 196.768 kg

xx Volume: TSWH analytic= 235.094 kg sampled= 196.768 kg

xx Volume: TSWH analytic= 235.094 kg sampled= 196.768 kg

xx Volume: TSWH analytic= 235.094 kg sampled= 196.768 kg

xx Volume: TSWH analytic= 235.094 kg sampled= 196.768 kg

xx Volume: TSWH analytic= 235.094 kg sampled= 196.768 kg

xx Volume: TSWH analytic= 235.094 kg sampled= 196.768 kg

xx Volume: TSWH analytic= 235.094 kg sampled= 196.768 kg

xx Volume: TSWH analytic= 235.094 kg sampled= 196.768 kg

xx Volume: TSWH analytic= 235.094 kg sampled= 196.768 kg

xx Volume: TSWH analytic= 235.094 kg sampled= 196.768 kg

xx Volume: TSWH analytic= 235.094 kg sampled= 196.768 kg

xx Volume: TSWH analytic= 235.094 kg sampled= 196.768 kg

xx Volume: TSWH analytic= 235.094 kg sampled= 196.768 kg

xx Volume: TSWH analytic= 235.094 kg sampled= 196.768 kg

xx Volume: TSWH analytic= 235.094 kg sampled= 196.768 kg

xx Volume: TSWH analytic= 235.094 kg sampled= 196.768 kg

xx Volume: TSWH analytic= 235.094 kg sampled= 196.768 kg

xx Volume: TSWH analytic= 235.094 kg sampled= 196.768 kg

xx Volume: TSWH analytic= 235.094 kg sampled= 196.768 kg

xx Volume: TSWH analytic= 235.094 kg sampled= 196.768 kg

xx Volume: TSWH analytic= 235.094 kg sampled= 196.768 kg

xx Volume: TSWH analytic= 235.094 kg sampled= 196.768 kg

xx Volume: TSWH analytic= 235.094 kg sampled= 196.768 kg

xx ======================================================

xx sum analytic: 5942.111 kg

xx sum sampled: 5023.157 kg

One level lower in the geometry is TSAW. It is the only daughter of TSWH. It has a consistent mass w/ it's mother volume.

One level below TSAW we have...

xx Volume: TPCE analytic=5942.111 kg sampled=4380.262 kg

xx Volume: TSWH analytic= 235.094 kg sampled= 196.768 kg

xx Volume: TSAW analytic= 235.094 kg sampled= 196.570 kg

=======================================

xx Volume: TWRB analytic= 1.874 kg sampled= 1.873 kg

xx Volume: TWR1 analytic= 4.120 kg sampled= 4.121 kg

xx Volume: TWR2 analytic= 1.874 kg sampled= 1.884 kg

xx Volume: TWR3 analytic= 4.120 kg sampled= 4.126 kg

xx Volume: TWBT analytic= 4.001 kg sampled= 3.999 kg

xx Volume: TWTR analytic= 1.028 kg sampled= 1.028 kg

xx Volume: TWMR analytic= 5.124 kg sampled= 5.111 kg

xx Volume: TC1O analytic= 0.509 kg sampled= 0.509 kg

xx Volume: TC11 analytic= 0.464 kg sampled= 0.464 kg

xx Volume: TC12 analytic= 0.419 kg sampled= 0.419 kg

xx Volume: TC13 analytic= 0.374 kg sampled= 0.373 kg

xx Volume: TC14 analytic= 0.326 kg sampled= 0.326 kg

xx Volume: TC15 analytic= 0.284 kg sampled= 0.284 kg

xx Volume: TC16 analytic= 0.274 kg sampled= 0.274 kg

xx Volume: TC17 analytic= 0.233 kg sampled= 0.233 kg

xx Volume: TCAB analytic= 15.051 kg sampled= 15.019 kg

xx Volume: TCA1 analytic= 15.051 kg sampled= 15.139 kg

xx Volume: TSAS analytic= 27.216 kg sampled= 24.707 kg **** 2.5 kg

xx Volume: TWAS analytic= 13.599 kg sampled= 12.492 kg

xx Volume: TBRW analytic= 1.102 kg sampled= 1.102 kg

xx Volume: TBRW analytic= 1.102 kg sampled= 1.102 kg

xx Volume: TBRW analytic= 1.102 kg sampled= 1.102 kg

xx Volume: TBRW analytic= 1.102 kg sampled= 1.102 kg

xx Volume: TBRW analytic= 1.102 kg sampled= 1.102 kg

xx Volume: TSA1 analytic= 44.745 kg sampled= 41.923 kg **** 3 kg

xx Volume: TWA1 analytic= 28.745 kg sampled= 27.323 kg

xx Volume: TBRW analytic= 1.102 kg sampled= 1.102 kg

xx Volume: TBRW analytic= 1.102 kg sampled= 1.102 kg

xx Volume: TBRW analytic= 1.102 kg sampled= 1.102 kg

xx Volume: TBRW analytic= 1.102 kg sampled= 1.102 kg

xx Volume: TWRI analytic= 33.107 kg sampled= 21.412 kg **** 10 kg

xx Volume: TRDO analytic= 22.633 kg sampled= 19.894 kg **** 3 kg

xx ===========================================

xx sum analytic: 235.094 kg

xx sum sampled: 212.853 kg

Volumes TSAS, TSA1, TWRI and TRDO account for about 1/2 of the missing mass.

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