ࡱ> $&#s  jbjb kk] \{}}}}}},  zzzzj{{zz:V/@{ t?]do NSTX CALCULATION Page 1 of 1 TITLE____Forces on Passive Plates Due To Non-Axisymmetric Current CALC. NO.____NSTX-CALC-11-09 DATE___12/13/00_____ ORIGINATOR___C Neumeyer________CHECKER____R. Hatcher___Rev.___0__ PURPOSE: This calculation estimates the forces on the primary and secondary passive plates due to non-axisymmetric current flow resulting from plasma disruption. In the original NSTX design this was not an issue because of the presence of copper jumpers between plates. However, since these jumpers were not installed, the non-axisymmetric current is anticipated. REFERENCES: 1) NSTX-CALC-11-04, NSTX PFC Stress Analysis 2) Inductance Calculations, F. W. Grover, p. 60, eq. 58 3) NSTX-CALC-11-02, Forces on Internal Hardware ASSUMPTIONS: Field at plates due to plasma estimated via spreadsheet nstx plasma fields.xls supplied by ORNL in ref. 1. Field at plates decays at a rate corresponding to 1.0MA/6mS. Current driven in plate simulated by rectangular loop of rectangular copper cross section, dimensions of loop corresponding to periphery of plate, dimensions of conductor assumed square with sides equal to thickness of plate. JxB forces based on background fields projected in ref. 3. CALCULATION: See attachments. CONCLUSION: Forces are significantly smaller than those on which the design was originally based when a large n=0 current flow was anticipated, due to the jumpers originally planned between plates.   8v^j CJOJQJ >*OJQJ >*OJQJOJQJ 23uv]^jl  $0  $  $0 $$ 23uv]^jl               %     $0 $ & F0  $P/ =!"#$% |HH(EG(HH(d'` [0@0NormalCJOJQJmH <A@<Default Paragraph Font&     3B`lVb7CQUfjCharles Neumeyer3Macintosh HD:Desktop Folder:Calc 11-8-0 Cover SheetCharles Neumeyer3Macintosh HD:Desktop Folder:Calc 11-8-0 Cover SheetCharles Neumeyer3Macintosh HD:Desktop Folder:Calc 11-8-0 Cover SheetCharles Neumeyer3Macintosh HD:Desktop Folder:Calc 11-8-0 Cover SheetCharles Neumeyer<Macintosh HD:Temporary Items:AutoRecovery save of Calc 11-8-Charles Neumeyer3Macintosh HD:Desktop Folder:Calc 11-8-0 Cover SheetCharles Neumeyer3Macintosh HD:Desktop Folder:Calc 11-9-0 Cover SheetCharles Neumeyer<Macintosh HD:Temporary Items:AutoRecovery save of Calc 11-9-Charles Neumeyer<Macintosh HD:Temporary Items:AutoRecovery save of Calc 11-9-Charles NeumeyerCMacintosh HD:Desktop Folder:NSTX-CALC-11-09:Calc 11-9-0 Cover Sheet   hho()hho()hho()@7ep@GTimes New Roman5Symbol3 Arial3Times7 Chicago9New York"A jLfjLfcLF !+2dCalc 11-2-0 Cover SheetCharles NeumeyerCharles Neumeyer Oh+'0 $ @ L X dpx'Calc 11-2-0 Cover SheetalcCharles Neumeyer ShharNormal Charles Neumeyer Sh3arMicrosoft Word 8.0h@2~@hud@e@F]e  ՜.+,0 hp  'PPPL1- Calc 11-2-0 Cover Sheet Title  !"%Root Entry FRd'1Table WordDocumentSummaryInformation(DocumentSummaryInformation8CompObjX FMicrosoft Word DocumentNB6WWord.Document.8