Monthly report of activities: JUNE 1, 1969

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Some of the things discussed in this report are: (1) Computation--NAL is now obtaining satisfactory service on NYU's 6600 computer via the telephone data link. Until about two weeks ago we were plagued by numerous breakdowns of the computer itself (one lasting about three weeks), and bugs in the NYU programs that control the transmission. Early this month a two month complete rebuilding of the NYU computer was begun. During this period Control Data Corporation is making a new computer at their Manhattan data center available to NYU and to the remote-terminal users. This computer is reasonably reliable, and the ... continued below

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Creator: Unknown. June 1, 1968.

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Some of the things discussed in this report are: (1) Computation--NAL is now obtaining satisfactory service on NYU's 6600 computer via the telephone data link. Until about two weeks ago we were plagued by numerous breakdowns of the computer itself (one lasting about three weeks), and bugs in the NYU programs that control the transmission. Early this month a two month complete rebuilding of the NYU computer was begun. During this period Control Data Corporation is making a new computer at their Manhattan data center available to NYU and to the remote-terminal users. This computer is reasonably reliable, and the most serious bugs have apparently been removed from the transmission system. NAL now has immediate access to the computer for most of the day and turn-around time for jobs with moderate amounts of output is often less than one hour. We have always received excellent service and help from Argonne's Applied Mathematics Division, which has made its two computers, a CDC 3600 and an IBM 360-75, available to us. At present we have a courier service to Argonne making three trips a day, soon to be extended to five. In addition IBM is furnishing very competent personnel to help convert 6600 programs to the 360. (2) Main-Ring Lattice--A small adjustment has been made in the quadrupoles of the long straight sections. Since the beam cross section is greatest there, these quadrupoles have been increased in aperture. To preserve focal length and pole-tip field, their length was also increased at the expense of about a meter of straight section length. The lattice is quite stable against changes of v. If all the quadrupole gradients are increased or decreased proportionately to cover a range of v between 18.5 and 22, the maximum increase in B is less than 20%, except for the stopland at v = 21 of width {Delta}v {approx_equal} {+-} 0.1, due to the structure resonance arising from the six -fold periodicity. (3) Injection Energy--A study was made of the appropriate injection energy for a 5 Hz booster to be used in connection with the accumulator ring. Both cost and performance were considered. The conclusion is that 200 MeV is still the most desirable injection energy for such a booster. (4) Main-Ring Magnet Computations--The design work using the computer program TRIM for the main ring bending magnet is continuing. The effort so far indicates that field shapes well within acceptable tolerance can be obtained up to at least 18 kG without crenellation for both B1 and B2 magnets and the degree of saturation can be made quite small (about 3.5% at 18 kG) and equal for both magnets. The proper coil configurations are 4 turns out of 12 placed between poles for B1 and 4 turns out of 16 placed in between poles for B2. With these coil configurations, the proper pole widths are approximately 8.5 in. for B1 and 8.8 in. for B2. (5) Secondary Beams--Studies are being made with A. L. Read of possible secondary beam layouts. One scheme is to channel a secondary beam through bending magnets and a set of three quadrupole triplets producing 3600 phase advance from source to target, with a momentum-analyzing slit at an image point 1800 downstream.

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  • Report No.: FERMILAB-NAL-1968-JUNE
  • Grant Number: AC02-07CH11359
  • DOI: 10.2172/945414 | External Link
  • Office of Scientific & Technical Information Report Number: 945414
  • Archival Resource Key: ark:/67531/metadc900145

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  • June 1, 1968

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  • Sept. 27, 2016, 1:39 a.m.

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  • Dec. 6, 2016, 1:39 p.m.

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Monthly report of activities: JUNE 1, 1969, report, June 1, 1968; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc900145/: accessed September 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.