1 / 10

Magnet field testing

Magnet field testing. Upstream magnets:- Dipole B1 Quadrupoles Q1-Q3 Downstream magnets:- Dipole B2 Quadrupoles Q4-Q9. Kevin Tilley, Paul Flower, Mark Rayner , Henry Nebrensky, 16 th November. Upstream dipole – B1 – completed tests.

cachez
Download Presentation

Magnet field testing

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Magnet field testing • Upstream magnets:- Dipole B1 Quadrupoles Q1-Q3 • Downstream magnets:- Dipole B2 Quadrupoles Q4-Q9 Kevin Tilley, Paul Flower, Mark Rayner , Henry Nebrensky, 16th November

  2. Upstream dipole – B1 – completed tests • Upstream dipole critical to extract beam from synchrotron vault. • Performed functional tests prior to installation in July. • Performed electrical/water tests (AN talk) Measurements agreed perfectly with tables & theory (Leff) to 250A. Not tested to full field. Central field versus current to250Amps. Field map & L_effectiveas expected

  3. Upstream dipole – B1 – future tests • Polarity in situ • Full B.v.I tests (into saturation) • Determine rqd reproducibility (B/I) • Measure hysteresis • & complete standardisation if rqd. • Scheduled for w/c 14th Jan’08 • May monitor the field of this measurement directly during running if hysteresis significant. • Note, some discussion about changing pole tip of this magnet for non-tapered pole (homogeneities) – use same tests

  4. Upstream quadrupole – Q1 – completed tests • Performed functional tests prior to installation in July. • Performed electrical/water tests (AN talk) • Measured g.v.I, hysteresis • Measured (g, magnetic centre, skew)

  5. Upstream quadrupole – Q1 – completed tests • Jig allows measurement of field relative to mechanical centre & known rotation – survey references. • Sample field along 3 lines -> extract 4 parameters, then solve for (g,magnetic centre(x,y), skew). Errors in magnetic centre ~ ±0.1mm • no significant magnetic centre displacement • no significant skew. • g.v. I as expected. • hysteresis measured at ~0.5% • - magnet works ok.

  6. Upstream quadrupoles – Q1-Q3 –future tests • Polarity in situ • Scheduled for w/c 14th Jan’08

  7. Downstream dipole – B2 – future tests • Polarity in situ • Full B.v.I tests (into saturation) • Determine rqd reproducibility (B/I) • Measure hysteresis • & complete standardisation if rqd. • Scheduled for w/c 9th Jan’08 or early December if services available.

  8. Downstream quadrupoles – Q4-Q9 – present tests • Perform basic tests.…to qualify as early as possible if any problems exist.… • Pole tip fields to determine ~g.v.I • Field balance on each pole tip / colloid. • If indications, potential to perform detailed checks with jig. • Expected to begin this week, turnaround time <1week per magnet.

  9. Downstream quadrupoles – Q4-Q9 – present tests • We have only incomplete field specifications for the Q35s! • Detailed tests on at least two Q35s complete with mirror plates. • Measure one magnet with each of the two coil types for reference data. • L_effective. • Adaptor & jig -> detailed (g,magnetic centre(x,y), skew) as before. • g.v.I • Determine required reproducibility. • Hysteresis. • Standardisation if required. • In ~2-3weeks

  10. Summary. • Upstream magnets:- Dipole:- performs well to 250A. Checks of full current, polarity, hysteresis in situ. w/c Jan 14th Quadrupoles: one magnet tested – performs well. Polarity of all in situ. w/c Jan14th. • Downstream magnets:- Dipole:- to be tested early December or w/c Jan 9th. Quadrupoles: basic testing schedule commencing this week. Detailed measurements on at least two of differing coil types for reference data.

More Related