Accurate magnetic field and field gradient measuring instrument for dynamic low fields in a synchrotron magnet

Journal Article · Thu Jan 01 04:00:00 EST 1959 · Nuclear Instruments and Methods

DOI:https://doi.org/10.1016/0029-554X(59)90044-8· OSTI ID:4287426

Nysäter, Hans M.

Two biased pesking strips have been combined into a differential magnetic probe. The pulses from the two peaking strips are displayed on an oscilloscope screen with a time separation, for the same blas field, given by the fleld difference between the locations of the two strips. At the blas current corresponding to the chosen field level, the two peaking strips are given silghtly different bias, so as to cancel the time lag between pulses. The field difference is read directly as a d-c current. The magnetic field itself is measured with one of the peaking strips, as its d-c bias current. With careful calibration, the accuracy in gradient divided by field (n-value) was estimated to be of the order or 1% in a nearly linear synchrotron field of 25 gauss, varying by 4 percent per cm and 0.15 gauss/ mu s. The instrument, when applied to the CEA magnets, confirmed the feasibility of an injection field as low as 25 gauss, although at the magnet ends sharp peaks occur in the field and gradient distributions, apparently a remanent field contribution.

• Research Organization: Harvard Univ., Cambridge, Mass.; Massachusetts Inst. of Tech., Cambridge
• Sponsoring Organization: USDOE
• NSA Number: NSA-13-009984
• OSTI ID: 4287426
• Journal Information: Nuclear Instruments and Methods, Journal Name: Nuclear Instruments and Methods Journal Issue: 1 Vol. 4; ISSN 0029-554X
• Publisher: Elsevier
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
CAMBRIDGE ELECTRON ACCELERATO
CONFIGURATION
CURRENTS
ERRORS
INSTRUMENTS
MAGNETIC FIELDS
MAGNETS
MEASURED VALUES
OSCILLOGRAPHS
PULSES
SYNCHROTRONS