In Tab. 1 the typical proton beam parameter at the
HERA-B target at WR09
are summarized.
Table 1: Parameter of the proton beam at the HERA-B
target position in 1996 and 1997. The horizontal
direction is denoted by the index x, the vertical by y.
HERA operates at a proton energy of 820 Gev
with currents up to 100 mA and with lifetimes of several
hundred or even thousand hours.
The protons are filled in 180 bunches with currents of around 0.5 mA ( 
protons), a
bunch spacing of 96 nsec and a typical bunch length of 1 nsec.
The detailed bx filling scheme is
shown in Fig. 4.
Figure 4: HERA p: bunch filling scheme. In total there are 220 RF buckets;
the last 15 empty buckets are necessary to guarantee a secure beam dump.