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SPS page 1

Figures for K12 Beam

Figures for K12 Beam

Principle of simultaneous, nearly-collinear KL and KS beams.

PS file here (EPS)

Schematic layout of KL + KS beams.

PS file here (EPS)

Detailed layout of the KL target station and of the proton beam trajectory via the bent crystal 'splitter' to the KS - TAGGING STATION, (vertical section).
The dashed line shows the trajectory followed by the pi- + K- calibration beam.

PS file here (EPS)
Schematic layout of the KL beam collimation scheme.

PS file
here (EPS)

Schematic arrangement of the bent crystal.

PS file here (EPS)

Variation of proton transmission onto the scintillation counters at the TAGGING STATION (relative to proton flux incident on the KL target: BSI), as a function of the current in Trim-5.

PS file here (EPS)

Displays of the time-variation of counting rates proportional to the KS beam (AKS, KSM), to the KL beam (BCTR) and of their ratio: KS/KL (AKS/BCTR) - over a SPS pulse (2380 msec).

PS file here (EPS)

Detailed layout of the KS target station and beam (vertical section).

PS file here (EPS)

Schematic layout of the KL and KS fiducial region and the passage of the beam through the centre of the detectors (vertical section).

PS file here (EPS)
Schematic layout of the vacuum tank and helium gas enclosure of the magnetic spectrometer, showiung the Kevlar window and beam tube (verticla section).

PS file
here (EPS)

Horizontal and vertical profiles of the primary proton beam at the focus onto the KL target, measured with SEM filament scanners: BBS (normalised to total flux recorded on BSI).

PS file here (EPS)

Horizontal and vertical profiles of the proton beam incident onto the KS target, measured with (0.2 mm wide) filament scintillation counters: FISC 7+8 (normalised to the flux on the KL target: BSI).

PS file here (EPS)

Horizontal and vertical profiles of the KL and KS neutral beams, measured separately, counting charged particles from conversion in the (4 mm wide) Cu strips attached to Fisc 9+10 of the MONITOR STATION.
The upstream converter normally preceding the AKS counters was removed, so as not to defrade the profiles of the KS beam.

PS file here (EPS)


A description of the beams has been presented as a poster at the 1998 European Accelerator Conference at Stockholm. A Postscript file (for printing only) of the short (3 pages) contribution to the Proceedings is available. A long and detailed description of the beam (NA48 Note 98-16, SL Divisional Report 98-033) is available both in PDF and compressed Postscript format.

N.Doble, Lau Gatignon and P.Grafstrom, 24 August 1998