[en] The beam excursions during extraction depend on the size of the 'triangle' in phase space: a larger triangle will give rise to larger oscillations during extraction (since a pulse stretcher is extracting the beam most of the time, 'during extraction' is the situation which exists 95% of the time). The size of the triangle is etermined during injection, see Fig. A15 from. The present injection parameters impose severe limitations on the dimensions of the injection septum. To ease these restrictions, it would be helpful to inject at a larger distance from the centre of the (displaced) Closed Orbit (C.O.); the consequences of this procedure are outlined (author). 2 refs.; 19 figs.; 2 tabs

[en] The RF requirements for the two modes of AmPS, Stretcher Mode and Storage Mode, are different. In Storage Mode, as is shown in this report, it is more practical to operate at a lower RF-frequency than f_RF=2856MHz, which is the RF-frequency in Stretcher Mode. A few consequences of operating the ring cavity at a lower frequency than the (injecting) linac frequency will be reviewed. (author). 1 ref.; 4 figs

[en] In Internal Target mode the beam will be stored for some time (minutes). Stored electron beams are bunhed, i.e. captured in an RF bucket. The RF voltage replenishes the synchrotron radiation losses. Due to this bunching, the microscopic duty factor of the stored beam is in generalmuch smaller than 100%. In this note the connection is shown between the values of the RF frequency, bunchlength, time between adjacent bunches, number of particles/bunch, microscopic duty factor and bunch current. (author). 2 refs.. 10 tabs

[en] The question has arisen if manipulation of the Closed Orbit with the two electrostatic injection kickers may lead to beam losses (and thus to a raised radiation level). Since this question is related to the way in which both kickers are handled a brief summary is given of the injection procedure. (author). 2 figs.; 2 tabs

[en] In order to reach the stage where only one may attempt to correct the machine closed orbit (CO), the beam should travel for at least one turn around the machine. To do so, AmPS is considered as a beamline. The beam will then be transported from one viewscreen (BV-monitor) to the next one, corrected each time by a preceding orbit corrector (OCh/v-pair). Simulations show that this procedure always improves the rms-value of the observed deviations at the viewscreens, and generally also reduce the value of the maximum beam excursions. (author). 1 fig.; 6 tabs

[en] The betatron tunes v_x and v_y will be measured by Fourier-analyzing a BPM signal generated by a beam which received a fast (<600) ns) kick. Alternatively, the tune can be measured by applying a (sinusoidal) signal of varying frequency to a pair of deflectors; if the fractional part of (f_kick/f_rev) equals the fractional part of the tune, a beam blow-up can be observed. In this note the required accuracy of such a tune measurement is discussed. (author). 6 schemes

[en] In this study the beam handling system of the 500 MeV system at IKO is described for the energy loss mode (dispersed beam at target) and the normal mode (achromatic beam at target). Specific details and system tuning characteristics are discussed

[en] This report deals with a copper collimator for low-energy electron beams. The report discusses heat transfer, radial escape, transverse penetration, thermal stresses and the specifications of the final design of the collimator

[en] During operational conditions it is anticipated that a fair amount of the total available beam power is dumped in either the slit system on one of the beam dumps. Thses beam absorbers therefore become strong radioactive sources. The radiation level due to the absorption of a 100 kW electron beam is estimated and the problem of residual activity is treated. Proposed shielding materials are discussed. (C.F.)

[en] This report gives an overview of the new layout of the Amsterdam Pulse Stretcher ring, which may operate in stretcher mode as well, and the various beam lines around it. (H.W.). 5 refs.; 5 figs