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Optical parameters of dipoles for the DAFNE upgrade M. Preger 6/11/2007.

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Presentation on theme: "Optical parameters of dipoles for the DAFNE upgrade M. Preger 6/11/2007."— Presentation transcript:

1 Optical parameters of dipoles for the DAFNE upgrade M. Preger 6/11/2007

2 References B. Bolli, N. Ganlin, F. Iungo, F. Losciale, M. Modena, M. Paris, M. Preger, C. Sanelli, F. Sardone, F. Sgamma, M. Troiani: "The 'Short' Dipoles of the DAFNE Main Ring Achromats", MM-19, 2/8/1996 B. Bolli, N. Ganlin, F. Iungo, F. Losciale, M. Paris, M. Preger, C. Sanelli, F. Sardone, F. Sgamma, M. Troiani: "The'Long' Dipoles of the DAFNE Main Rings Achromats", MM-25, 21/5/1997 B. Bolli, N. Ganlin, F. Iungo, F. Losciale, M. Paris, M. Preger, C. Sanelli, F. Sardone, F. Sgamma, M. Troiani: "The Dipoles of the DAFNE Main Rings Achromats", MM- 26, 22/5/1997

3 Field measurements taken along the ideal beam line (two straight sections and one arc of circle with the nominal bending radius) and along lines parallel to the ideal one Original results (References) taken by interpolating with a second order polynomial between 0, -1cm, +1cm Present results, because of bending angle and bending radius modification in sector magnets adjacent to the interaction regions, interpolated between 0, -2cm, +2cm Tracked transfer matrix obtained by difference between ideal particle (x=0, x’=0, ∆p/p=0) and particles with +1mm, +1mrad, ∆p/p=0.001 Tracked matrix fitted by optical model of two straight sections with a sector dipole in between with nominal length and bending radius, with entrance and exit angles left as free parameters

4 Bending radius (m) Length (m) Bending angle (deg) Straight section length (m) Sector long (old) Sector short (old) Parallel long Parallel short Sector long (new) Sector short (new)

5 Sector long dipoles (old) Serial number E (MeV)a11-a22 Det   (prot)

6 Sector short dipoles (old) Serial number E (MeV)a11-a22 Det   1 (prot)

7 Parallel long dipoles Serial number E (MeV)a11-a22 Det   not remeas -ured (prot)

8 Parallel short dipoles Serial number E (MeV)a11-a22 Det   1 (prot)

9 Sector long dipoles (new) Serial number E (MeV)a11-a22 Det   (prot)

10 Sector short dipoles (new) Serial number E (MeV)a11-a22 Det   1 (prot)


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