Acceptance of ET44 in 2000.

V.Andreev, 09-June-2002

 The 2000 H1 running period was devided on 7 samples which
 have the different offset or tilt of the electron beam in 
 the interaction point. 
   
 The list of this samples is shown bellow :
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
TransActID  Rtyp Dtyp  1.Run     Words    Author     Date   

  2648094   e-p  data  262200      70     vladimir   001113       
  2648095   e-p  data  263381      70     vladimir   001113        
  2648096   e-p  data  267501      70     vladimir   001113        
  2648097   e-p  data  271601      70     vladimir   001113        
  2648098   e-p  data  274881      70     vladimir   001113        
  2648099   e-p  data  275801      70     vladimir   001113        
  2648100   e-p  data  277601      70     vladimir   001113        

 ET44 acceptance was calculated for each sample using the standart
 procedure described in the H1 note #493
 and then the DB base was update by the new set of LET1 banks.
 
 The y-dependence of ET44 acceptance for different run periods is
 shown on picture and the same distributions for the previous years
 are also given for the comparision on the next acc-1999,
 acc-old pictures.

 The systematic error of the acceptance determination for ET44
 in 200 is formed by the next parts:

   a) uncertainty in the energy scale determination  --> 2.5 % , 

   b) trigger efficiency                             --> 1.0 % ,

   c) error connected with the uncertainty in the position 
      of ET44 with respect to the electron beam      --> 3.5 % ,

   d) error which reflects the averaging of the several
      calibration sets                               --> 1.6 % ,

   e) uncertainty connected with the fit procedure   --> 0.6 % ,

   e) uncertainty connected with the limited y-range --> 0.6 % .
   
 So the overall systematic error in the acceptance determination
 of ET44 in 2000 is equal 4.8 % .

 More details for the previos years one can also find in the 
 description of 1999, 1998 , 1997 and 1996 .