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Machine-read from the scan, so expect some errors. Lines that couldn’t be read are left out.
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LOS AUMOS SCIENTIFIC UB ORATORY h piet e construction and checkout of 5 chders. checks w i t h the source can proceed as daubers are cornCbdc out of 0ver)raUl the chamber to encoder cables. All ten cables should be collected and put in good condition. Jim Wing and Cam01 George w i l l handle these. Restring encoder signal cables, install enooder racks i n the mpe ~location, shift m encoder boxes dam stairs, length a n needed to get better timing between the upper Chan6erzr and the laver a e s . Some modifications are. needed t o the KLUE software before the checkout can begin. Also sane concrete is in the w a y on the second level, but will be m d as soon as possible. Jerry Helland will oversee the encoder checkout and a t the appropriate time will request manpaver from N.1 and others t o get this large cards being checked by W-1, and individual wirt and Eegin encoder checkout. Adjustments in signal cable Derign new &der mo1plt5 and alignment adjustments. Chanber 2 needs an entirely new mount, possibly tapped into the field clamp for b D 3 . Ihe cards for dhamber 2 can probably be serviced by rolling SLIT 2 dam the rails and out of the way. chamber should also be started. (%hers 3 and 4 below BlD3 have t o be remounted i n a mre secure fashion with some pmvision for adjustmnt. The existing alignment jig should be chamber 6 was used previously. Parameters are not yet set A better source alignment jig for this W e r s 5 and 6 need a new mount since only
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hnva to be easily d l e and still hon a reproducible inddng morrnt attached t o the plate or t o the floor. PKnrisian is hccdtd to attach TOF canters. UN people uill wofi a~design and fab of this equip ~ t . Dwelop a HV mvhllator for pulsing dumhrs for the methinking about this pd lm. Our situaticm differs frum MP-10's in that we are usin negative voltage. D. Doss is looking at our specific pdlem. Devlclop a crude workin biological model so that design of static stopping distrifutions can take place. Stopping depth thicknesses of 4to7 an are needed. 'he distzibutians will be tailored by use of the SLIT 2 mcmmtun defining jaws, "pooi' wedges, and possibly mmentun shaping collimators in the Y-2 plane. Ik can simulate the effects of each of these devices on the existing mkntun spectra nQw cm tape. %is work will lead t o specification for SLIT 2 settings, *poOi' for the wedge insertian mechanism and d fic a tim of the SLIT 2 rails will follow. Amols, Schillaci, and Paciotti are We have enaugh quad measuranezlt data t o do a mu& job of predicting the quad interaction effect. The interaction anmmts t o a 1.H effect in the total integral for equal exdt a tian of the adjmt magnet. It agpears t o be a small effect but could pew shift an effective boundary (Em) by a 5 OT 101 for uneqw excitation. Hutson is developing EL fonrmla for the perturbed effective Xengths. With better EFB's and quad magnetization data, we can continue studies on the Q448 matrices using the existing data, With full X, 8 ,Y,$, and 6 data a t the entrance of Q4, we can predict the X and Y coordinates a t the lower charrber and cq are with the measumd data in that chamber. A t present the differences are about 2 an ~ p l sfor an 8 an rn x-profile and 1 cm rpu for a 1.2 an ms Y-profile. We intend t o reach an early conclusion cm the significance of these differences; 1) whether the new data will impmve the differences, 2) whether w e are satisfied with t h e e widths, or 3) whether we should chalk up the differ ences t o higher order effects. Another approach t o the problem is t o n m & rzy trace code WIOR using -the magnetic field data we nag have. We might then establish that the differences
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TO: Distributim 3- I mm Kovember 3, 1975 des- above are to be expected. Another variation is t o ampm MJI'OR with lnodel fields for the quads and the TRANSPORT matrices for those fields. Bradbuxy, Hutsm, and Pad ott i are imrolved. 8) W o r k s-hmld proceed imneiliately to find TRWSKlKT solutions beam. WM has agreed that all new beam developllent be h e w i t h an approximately 90 cm final Qift. The iqlications of t h i s decisiar have been discussed, rad should be reviewed, The input beam for these studies is taken fmn the m a s d phase space abm 44 not Fequirins transmission through Q8. 'he quad interaction modificatims t o the Em's can be inserted spld the TRMSWRT m a . The next step is t o trwsport the taped data above 94 through Q8. a rtures and scattering can be included. ?(re appropriate The taped data would be again transported and the resultant particle distributions studied in detail; field flattening ideas, collimation, 01other possible changes can be evaluated. These output b e a m can be input into BXKET. Hutson, Smith, and Lanc are nmning 'IRASPORT; Padotti and Helland w i l l provide in- phase space and output data for BUCKET. Given initial settings for 5tmes, we need a procedure to tme these i n once the beam arrives. With S &ambers operating we can get approximate matrix elements for the tramsfomtion firm the first f o a s or fmn the top of 44 t o the end of the charnu?l, We can calculate derivatives of these elements with nspect t o Q4-Q8 settings using TRCWS". If by chance the derivatives are verified, we could proceed with a hand-operated optimizer. Padotti will look at h w wll we can lneasure individual matrix elements. The same scheme might be tried on All are invited to think about field flattening and beam aptimizatim; two 'hcn-straight-fomard'crard" problems we face. 9) #e would like to conplete the BE1)1,2 magnetic field analysis, deriving new EFB's and thereby hopmg t o improve agreemnt be- -TRAYECI' and the data on tape. We w i l l look particularly at the waist position at the nrnnenttnn focus. proceeding with this work at reduced priority. 10) A new wedge holder and perhaps a new wedge is needed for u5e with SLIT 2. Ihe optimized Be wedge might also be constructed naw; although only a slightly narrmer exit spec tm is expected. pK"ase above Q4 is thenavailable if TRANsPO~is t o be rem.
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TO: Distribution 4.- DATE: hwmber 3, 1975 'Ib6 mmdmn depth required far the static beam work was agreed t o be 12 ~ l l . A lomr energy beam offers better edge shazpiess an the sides and cn the drrwnstream edge at the expaue of hiw~ccmtaainsltion and possibly lower dose rate in large wlums. wb nust weigh these facton and select a lymantrn or m a to be mud far the tuning wo*. artain bean masumrants will be done at high mo- =tun t o minimize scatter hg effects. A ubdge will also be designed t o give a beam of 12 CUI range. The data tape made at 160 hleV/c nominal mormennmn will be used t o optimize a wedge accepting k 101 manentun bite and yielding a naflw~bear of approocinately 1 2 an range. E m thou@ the static bean work will not use a wedge at all a t first, we may get on t o the use of ridge filters sooner than we think. U i n g the tuzing period we should not pass up the dmnce t o measure the romenhrm spectm from a uedge designed far l - ~ nwmenhrm. Paciotti is involved w i t h wedge design since it is be fhm existing tapes. Others may w a n t to get invDlved in the general problem of wedge inIfhen beam canes on work will proceed in mon or less the following Debug, plateau, time, and test HV modulator on dambers w i t h beam. Set up TOF system and all other electnnics, xnitoring, etc. &&out any ranaining aspects of new sof-are. ReproQlCs several previously measured nms. We will use the optimized settings of the triplet. Included w i l l be the reproduction of the sensitive resolution function plots and of the mornentm distribution from the wedge. (6 shifts). Make a catalog of tapes for the single optimized tune with sew ral settings of SLIT 1 and SLIT 2. These tapes will serve as reference for future studies. Several settings of W-QB should be used. Measure completely the 5 tunes with quads set as determined by the work described by the previow section 8). Rim the tune mcedure as developed -der the Section 8). Y-Y readuxt chamber will be a most useful device for this work when used alonn with the mm t ional blrlPC's. This is csrtaPnly our weakest area. The Cram
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Attenpt field flattening QL the times. One prawn techniqu6 for flattening x' at the wedge was to find a l l the prectical locatiau where x' is COTnlated with positim and placing cunputer apertrrres. WC should also be studying core chogping, core scattering, or other techniqws so far not devised. saaewhen later in the thg period we will verify the improved manentlrm resolution with the uptimized wedge. We will also at this tinre try the lwer moP r e y i o ~\IJDrj( with the A-3 plug in mid-position was dare with about 1 0 W peak in Area A w i t h about 0.5% tramsmissim ~ ~ I U U @ Ihole. The new plug miat have a transmission of 0.1%, and the new tuning target is Imn high in place of the earlier 3 m target. Cur average rates were approximately 5 times higher than the cptinam rate. This all anwnts t o saying that we would like 0.3M peak on our target, and using the A-3 plug option, the area A current could be MOM peak. Biomed Controls Comaittee