Initial Guidance

A design should have necessary tunability to correct typical construction errors in the first two allowed harmonics. It should also have good mechanical geometry such as:

(a) arc length of each wedge at the outer radius of the coil layer larger than or equal to the arc length at the inner layer,

(b) each conductor blocks not deviating too much from their radial positions,

(c) pole angle of each layer or the alignment of the pole block of each layer is such that the collars can efficiently provide pre-stress on the coil. For this pole alignment angle (alpha angle of the pole turn in ROXIE) should be less than pole angle (phi angle of the pole turn in ROXIE),

(d) in two-layer coils, the pole angle of the outer layer should be equal to or less than pole angle of the inner layer. Moreover, if the pole angles of the two layers are closer to each other, then please make the pole angles and pole alignment angles of the two equals.

The following should be included in the upload for each design:

  • All input files needed for the ROXIE including the file for cable parameters (xxx.data, xxx.iron, yyy.cadata, zzz.bhdata). There could be two sets of files. First set will be for a detailed run at or near the design field or field gradient for 275 GeV. These files will create quench plots and extended output files, DXF files, etc.   The second set will cover the full range of operation (41 GeV to 275 Gev). Please allow some extra range such as 20% less than the injection to the quench field. The second file will compute the field harmonics as a function of current both in the aperture of main magnet and in the hole for the electron beam or the electron magnet.
  • All output files from ROXIE for the above two sets. These include but not limited to the following files: xxx1.output, xxx1.post. xxx1.dxfxy, xxx1.dxfiron, etc. from the first set and xxx2.output and xxx2.post from the second set which computes harmonics as a function of current. You should plot both the allowed harmonics and the non-allowed harmonics in prime units (bns) at the specified reference radius as a function of current in the main magnet. You should also compute field and field harmonics in the electron hole in Tesla (Bns). Only Q1BpF has a quadrupole in the hole. In this case the calculations should include the electron magnet coil in the hole.
  • If you used COMSOL or OPERA to do any calculations, then they should also be uploaded.
  • A summary powerpoint, doc or pdf file showing the peak fields, quench margins, field harmonics at the design field, the variation of field harmonics as a function of current in the proton and electron aperture and the field in the electron aperture.