Difference between revisions of "Kinematics"

Revision as of 18:10, 4 January 2011

Kinematics

Kinematic Calculators

• Two body kinematics

• Elastic Scattering Calculator

• Scattering from Deuterium

HRS Calibration

HRS(L) and HRS (R) Elastic C(e,e') [ and Ta(e,e')]

 (not in use)

 (not in use)

• The setup is according the Elastic scattering from Carbon
• Values in brackets for Ta
• With Sieve slit In/Out and multi foil target
• Additional run at H3 kinematics with raster on

HRS(L) and HRS (R), Quasi Elastic C(e,e')

Original Kin Table

 (not in use)

 (not in use)

• Calibration for relative acceptance measurement With Sieve slit Out

HRS(L) and HRS (R), Delta resonance C(e,e') - One pass

 (not in use)

 (not in use)

• W^2 = M^2 - Q^2 + 2*M*nu (W=1232 MeV)
• Calibration for relative acceptance measurement With Sieve slit Out

HRS(L) and HRS (R), Delta resonance C(e,e') - Two pass

 (not in use)

 (not in use)

• Calibration for relative acceptance measurement With Sieve slit Out

HRS(L) and HRS (R) H(e,e'p)

 (not in use)

 (not in use)

• With Sieve slit In/Out

HRS(L) and HRS (R) H(e,e'p)

• Polarity change

 (not in use)

 (not in use)

• With Sieve slit In/Out

Quasi Elastic C(e,e'p)

Note : These kinematics were a alternative to the first pass optics data for the two HRS's. See Kinematics H1-H5 above. These data points G4 and G5 are no longer necessary.

Quasi Elastic C(e,e'p) Kine Table

HRS(L) and HRS (R) C(e,e'p)

Original kin table

 (not in use)

 (not in use)

• 4 pass calibration at x=1, with sieve slit In/Out

BigBite Calibration

Important : BB calibration can't be done with 3 or 4 pass because we can't lower the HRS left angle below 12.5 deg and BB angle lower than ~ 70 Deg.

H(e,e'p) HRS(L) and BigBite

 (not in use)

 (-68 Deg)*

 (not in use, at 50 deg)

 P(p) vs P(e) 
 P(p) vs Ph(p)
 Ph(e) vs Ph(p)
 Mceep summary

 P(p) vs P(e) 
 P(p) vs Ph(p)
 Ph(e) vs Ph(p)
 Mceep summary

 P(p) vs P(e) 
 P(p) vs Ph(p)
 Ph(e) vs Ph(p)
 Mceep summary

 P(p) vs P(e) 
 P(p) vs Ph(p)
 Ph(e) vs Ph(p)
 Mceep summary

 P(p) vs P(e) 
 P(p) vs Ph(p)
 Ph(e) vs Ph(p)
 Mceep summary

• We do not know how to get within the constrains protons of more than 600 MeV/c to BB for Calibration.

Full acceptance calibration of BigBite C(e,e'p) and C(e,p)

 (not in use)

 (-68 Deg)*

 (not in use, at 50 deg)

• 3* Same as B2 with Sieve Slit
• 4* Same as B2 with Sieve Slit and no Field in BigBite

Full acceptance calibration of BigBite d(e,e'p) and d(e,p)

 (not in use)

 (-68 Deg)*

 (not in use, at 50 deg)

Neutron Array calibration

H(e,e'p) HRS(L) and Neutron Array for protons

 (not in use)

 (Not in use)

  no lead wall 
 50 Deg 15m from target

This can also be done with 4.4 GeV beam and E' of 3.9 GeV and 12.5 degrees with the proton going with 1 GeV to 57 degrees. MUCH higher cross section if done with 4th pass. Not sure why done with 2nd pass?!

d(e,e'pn) x<1 HRS(L), HRS(R) and Neutron Array (n - efficiency)

detector off

 Behind BigBite and lead wall

• In this calibration we need to switch the polarity of HRS arms.

^ First Kinematics cross section of 0.7E-7 fm^2/MeV/sr^2 BUT recoil is only 250 MeV/c. TOO SMALL?! (i.e. below physics range)

^ Second Kinematics cross section of 0.6E-8 fm^2/MeV/sr^2 for recoil of 400 MeV/c

4400 GeV beam 4068 & 12.5 electron with -35.5 & 628 proton which will put a 527 MeV/c neutron into 99 degrees. [MCEEP PWBA sigma of 0.8E-9 fm^2/MeV/sr^2 BUT should x10 higher due to FSI in these kinematics]

For cm of exactly 90 4400 GeV beam 12.5 electron and 15 degrees proton at 700 MeV/c 0.1E-9 {no FSI in simulation}

Production

D(e,e'pn) Triple coincidence for x>1

Kin2 above is 0.16E-10 fm-2/MeV/sr2 (0.04 (e,e'p) events per sec.) or ~2 events per minute (15cm target)

Kin6 above is 0.3E-9 fm-2/MeV/sr2

He(e,e'pp)/(e,e'pn) Triple coincidence for x>1

Production (alternative) Q2=1.8

Notice : Mott Cross Section for Q2=1.8 GeV^2 is 1.32 times higher than Mott Cross Section for Q2=2 GeV^2

D(e,e'pn) Triple coincidence for x>1

He(e,e'pp)/(e,e'pn) Triple coincidence for x>1