Split-pole magnetic spectrograph for precision nuclear spectroscopy

Spencer, J.E.; Enge, H.A.

doi:10.1016/0029-554X(67)90684-2

Split-pole magnetic spectrograph for precision nuclear spectroscopy

J.E. Spencer
(
- MIT
)
,
H.A. Enge
(
- MIT
)

Apr, 1967

13 pages

Published in:

Nucl.Instrum.Meth. 49 (1967) 181-193

DOI:

10.1016/0029-554X(67)90684-2

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Abstract:

A split-pole, broad-range magnetic spectrograph has been designed that uses the fringing fields associated with four pole boundaries to obtain two-directional focusing over the full momentum range of pmax/ pmin≈2.8 (energy range Emax/ Emin≈8). The spectrograph is also approximately second-order focusing in the plane of dispersion (median plane) over this entire range. Different magnetic configurations (pole shapes) were simulated by computer and used in a program designed to trace rays of different initial conditions through the spectrograph. These computer experiments were then used to optimize the design and resulted in an instrument for which the median-plane aberration of second order was zero or very small over the entire energy range. Measured peak shapes and resolving power are in good agreement with calculations. A resolving power better than p/ Δp = 5000 has been demonstrated in the 106Pd(d,p) 107Pd reaction with a 50 μg/cm 2 target and a solid angle of 0.8 msterad.

References(7)

Figures(0)

[1]

H.A. Enge

- Rev.Sci.Instrum. 29 (1958) 885

[2]

H.A. Enge

- Nucl.Instrum.Meth. 28 (1964) 126

[3]

C.M. Braams

- Nucl.Instrum.Meth. 26 (1964) 83

[4]

Effect of Extended Fringing Fields on Ion-Focusing Properties of Deflecting Magnets

Harald A. Enge
(
- MIT
)

- Rev.Sci.Instrum. 35 (1964) 278-287
•
DOI:
- 10.1063/1.1718806

[5]

Experimental Nuclear Physics,1

K.T. Bainbridge

[6]

C.P. Browne
,
W.W. Buechner

- Rev.Sci.Instrum. 27 (1956) 899

[7]

paper presented at the Heidelberg Conf. Progress in Nuclear Physics with Tandems

H.A. Enge