next up previous contents
Next: Run B (Z/A) Up: Summary of Run Plans Previous: General

Run A (Z/A tex2html_wrap_inline3779 )

The field in both spectrometer magnets will be set to +0.75T to optimize acceptance for species with Z/A=+1/2. The primary physics emphasis in this run is to study the central production of nuclei. This will help to understand the dynamics involved in producing composite systems. The species to be studied in this run are listed in Table gif. The positive value of the field means that the magnet is set to deflect positive particles into the experimental acceptance. With the multiplicity trigger only it is possible even with modest beam rate to saturate the DA system rate of 4000 events per spill. In 100 (calendar) hours, assuming an AGS macro duty cycle of 20%, a total of tex2html_wrap_inline3793 central collisions will be recorded.

   table1006
Table: Centrally produced composites studied in Run A

The acceptance times efficiency of the apparatus for the positive nuclei listed in the table is about 4%. (See Table gif.) The efficiency of the calorimeter, as discussed in the section on the calorimeter simulation, is 42%. We note that there is no live time correction here since the 4000 events per spill is DA limited.

Thus, the species studied in this run will be detected at a sensitivity of one event per:

displaymath3823

displaymath3825

displaymath3827

For the more abundant species and species with charge greater than 1 where use of the calorimeter is probably not necessary this number will double. We note that the typical rate for mass 8 nuclei predicted by a thermodynamic model is around tex2html_wrap_inline1961 per central collision. This would give about 50 reconstructed particles for a mass 8 nucleus in this run.

We note that we can also search for the composite charged tex2html_wrap_inline3831 system in Run A. The yield of tex2html_wrap_inline3833 in 14.5 Gev/c Si ions on Au has been estimated to be tex2html_wrap_inline2867 - tex2html_wrap_inline1951 per central collision. This would surely be higher for Au-Au collisions. We know that deuterons are ``plentiful'' so that our sensitivity of tex2html_wrap_inline3839 per collision would appear to be significant.


next up previous contents
Next: Run B (Z/A) Up: Summary of Run Plans Previous: General

root
Tue Jan 21 17:29:21 EST 1997