Kinematics

From Hall A Wiki
Revision as of 18:10, 4 January 2011 by Vasulk (Talk | contribs) (→‎Quasi Elastic C(e,e'p))

Jump to: navigation, search

Kinematics

Kinematic Calculators


HRS Calibration

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

Kin Ein [MeV] HRS(L) Electrons HRS(R) Electrons BigBite 
 (not in use)
Neutron Arm 
 (not in use)
Target Plots MCEEP
H# P(e') Theta (e') P(e') Theta (e') P Theta P Theta
1 1160 1202.1 (1206.1) 15 1202.1 (1206.1) -15 Carbon (Ta) Kin Map
2 1160 1179 (1182.9) 15 1179 (1182.9) -15 Carbon (Ta) Kin Map
3 1160 1155.9 (1159.7) 15 1155.9 (1159.7) -15 Carbon (Ta) Kin Map
4 1160 1132.8 (1136.5) 15 1132.8 (1136.5) -15 Carbon (Ta) Kin Map
5 1160 1109.6 (1113.3) 15 1109.6 (1113.3) -15 Carbon (Ta) Kin Map
  • 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


Kin Ein [MeV] HRS(L) Electrons HRS(R) Electrons BigBite 
 (not in use)
Neutron Arm 
 (not in use)
Target Plots MCEEP
I # P(e') Theta (e') P(e') Theta (e') P Theta P Theta
1 1160 1157.6 15 1157.6 -15 Carbon Kin Map
2 1160 1135.4 15 1135.4 -15 Carbon Kin Map
3 1160 1113.1 15 1113.1 -15 Carbon Kin Map
4 1160 1090.84 15 1090.84 -15 Carbon Kin Map
5 1160 1068.6 15 1068.6 -15 Carbon Kin Map
  • Calibration for relative acceptance measurement With Sieve slit Out

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

Kin Ein [MeV] HRS(L) Electrons HRS(R) Electrons BigBite 
 (not in use)
Neutron Arm 
 (not in use)
Target Plots MCEEP
L # P(e') Theta (e') P(e') Theta (e') P Theta P Theta
1 1160 818.2 15 818.2 -15 Carbon Kin Map
2 1160 802.4 15 802.4 -15 Carbon Kin Map
3 1160 786.7 15 786.7 -15 Carbon Kin Map
4 1160 770.9 15 770.9 -15 Carbon Kin Map
5 1160 755.2 15 755.2 -15 Carbon Kin Map
  • 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

Kin Ein [MeV] HRS(L) Electrons HRS(R) Electrons BigBite 
 (not in use)
Neutron Arm 
 (not in use)
Target Plots MCEEP
M # P(e') Theta (e') P(e') Theta (e') P Theta P Theta
1 2258 1843.4 15 1843.4 -15 Carbon Kin Map
2 2258 1807.9 15 1807.9 -15 Carbon Kin Map
3 2258 1772.5 15 1772.5 -15 Carbon Kin Map
4 2258 1737 15 1737 -15 Carbon Kin Map
5 2258 1701.6 15 1701.6 -15 Carbon Kin Map
  • Calibration for relative acceptance measurement With Sieve slit Out

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

Kin Ein [MeV] HRS(L) Electrons HRS(R) Protons BigBite 
 (not in use)
Neutron Arm 
 (not in use)
Target Plots MCEEP
G# P(e') Theta (e') P(p) Theta (p) P Theta P Theta
1 1160 820 48.3 867 -44.92 LH2 Kin Map
2 2258 1605 33.8 1285 -44.01 LH2 Kin Map
  • With Sieve slit In/Out

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

  • Polarity change
Kin Ein [MeV] HRS(L) Protons HRS(R) Electrons BigBite 
 (not in use)
Neutron Arm 
 (not in use)
Target Plots MCEEP
G# P(p) Theta (p) P(e) Theta (e) P Theta P Theta
3 2258 1285 44.01 1605 -33.8 LH2 Kin Map
  • 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.

  • This calibration should be done AFTER polarity change

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

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

Original kin table

Kin Ein [MeV] HRS(L) Electrons HRS(R) Protons BigBite 
 (not in use)
Neutron Arm 
 (not in use)
Target Plots MCEEP
F # P(e') Theta (e') P(p) Theta (p) P Theta P Theta
1 4462 3518.5 15 1400 -40.57 Carbon Kin Map
2 4462 3518.5 15 1400 -40.57 Multi Foil Carbon Kin Map
  • 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

Kin Ein [MeV] HRS(L) Electrons HRS(R) 
 (not in use)
BigBite 
 (-68 Deg)*
Neutron Arm 
 (not in use, at 50 deg)
Target Plots MCEEP
A# P(e') Theta (e') P Theta P(p) Theta (p) P Theta
1 1160 1097.2 17.5 -12.5 349.5 -71.0 -50 4cm LH2 Kin Map 
 P(p) vs P(e) 
 P(p) vs Ph(p)
 Ph(e) vs Ph(p)
 Mceep summary
2 1160 1076.5 20.4 -12.5 404 -68.08 -50 4 cm LH2 Kin Map 
 P(p) vs P(e) 
 P(p) vs Ph(p)
 Ph(e) vs Ph(p)
 Mceep summary
3 1160 1057.7 22.8 -12.5 450 -65.7 -50 4 cm LH2 Kin Map 
 P(p) vs P(e) 
 P(p) vs Ph(p)
 Ph(e) vs Ph(p)
 Mceep summary
4 2258 2136.1 12.5 -12.5 493 -69.54 -50 4 cm LH2 Kin Map 
 P(p) vs P(e) 
 P(p) vs Ph(p)
 Ph(e) vs Ph(p)
 Mceep summary
5 2258 2086.8 15 -12.5 592.0 -65.84 -50 4 cm LH2 Kin Map 
 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)

Kin Ein [MeV] HRS(L) (Electrons) HRS(R) (not in use) 
 (not in use)
BigBite 
 (-68 Deg)*
Neutron Arm 
 (not in use, at 50 deg)
Target Plots MCEEP
B# P(e') Theta (e') P Theta P(p) Theta (p) P Theta
1 2258 2087 15 -12.5 -68 -50 1 mm Carbon Kin Map
2 2258 2087 15 -12.5 -68 -50 multifoil Carbon Kin Map
3* 2258 2087 15 -12.5 -68 -50 multifoil Carbon Kin Map
4* 2258 2087 15 -12.5 -68 -50 multifoil Carbon Kin Map
  • 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)

Kin Ein [MeV] HRS(L) (Electrons) HRS(R) (not in use) 
 (not in use)
BigBite 
 (-68 Deg)*
Neutron Arm 
 (not in use, at 50 deg)
Target Plots MCEEP
C# P(e') Theta (e') P Theta P(p) Theta (p) P Theta
1 2258 2086.8 15 -12.5 -68 -50 4 cm LD2 Kin Map

Neutron Array calibration

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

Kin Ein [MeV] HRS(L) Electrons HRS(R) 
 (not in use)
BigBite 
 (Not in use)
Neutron Arm 
  no lead wall 
 50 Deg 15m from target
Target Plots MCEEP
D# P(e') Theta (e') P Theta P(p) Theta (p) P Theta
1 2258#. 27.6 -12.5 -68 1071 -50.07 4 cm LH2 Kin Map

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)

Kin Ein [MeV] HRS(L) PROTONS HRS(R) ELECTRONS BigBite at -99 Deg, Magnet on 
detector off
Neutron Arm 
 Behind BigBite and lead wall
Target Plots MCEEP
E# P(p) Theta (p) P(e') Theta(e') P Theta P(n) Theta(n)
1 2262 778.7 59.2 1948.7 -12.5 -99 250 -99 4 cm LH2 Kin Map
2 2262 985.8 51.9 1757.9 -12.5 -99 400 -99 4 cm LH2 Kin Map
  • 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

Kin Ein [MeV] HRS(L) Electrons HRS(R) Protons BigBite Neutron Arm Target Plots MCEEP
K# P(e') Theta (e') P Theta P(p) Theta (p) P Theta
2 4454 3601.4 20.33 1375.8 -33.4 500 -98.23 500 -98.23 4 cm LD2 Kin Map
6 4454 3601.4 20.33 1468.9 -40.5 300 -97.63 300 -97.63 4 cm LD2 Kin Map

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

Kin Ein [MeV] HRS(L) Electrons HRS(R) Protons BigBite Neutron Arm Target Plots MCEEP
K# P(e') Theta (e') P Theta P(p) Theta (p) P Theta
1 4454 3601.4 20.33 1427.6 -36.9 400 -99.29 400 -99.29 4 cm LHe4 Kin Map
2 4454 3601.4 20.33 1375.8 -33.4 500 -98.23 500 -98.23 4 cm LHe4 Kin Map
3 4454 3601.4 20.33 1296.6 -29 625 -95.22 625 -95.22 4 cm LHe4 Kin Map
4 4454 3601.4 20.33 1201 -24.45 754.7 -91.22 754.7 -91.22 4 cm LHe4 Kin Map
5 4454 3601.4 20.33 1099.2 -20.1 875 -87.06 875 -87.06 4 cm LHe4 Kin Map


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

Kin Ein [MeV] HRS(L) Electrons HRS(R) Protons BigBite Neutron Arm Target Plots MCEEP
L# P(e') Theta (e') P Theta P(p) Theta (p) P Theta
1 4454 3686.6 19.06 1270.8 -34 500 -99.68 500 -99.68 4 cm LD2 Kin Map
2 4454 3686.6 19.06 1366.9 -41.65 300 -99.97 300 -99.97 4 cm LD2 Kin Map

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

Kin Ein [MeV] HRS(L) Electrons HRS(R) Protons BigBite Neutron Arm Target Plots MCEEP
M# P(e') Theta (e') P Theta P(p) Theta (p) P Theta
1 4454 3686.6 19.06 1323.97 -37.75 400 -101.14 400 -101.14 4 cm LHe4 Kin Map
2 4454 3686.6 19.06 1270.8 -34 500 -99.68 500 -99.68 4 cm LHe4 Kin Map
3 4454 3686.6 19.06 1190.2 -29.3 625 -96.3 625 -96.3 4 cm LHe4 Kin Map
4 4454 3686.6 19.06 1090.1 -24.3 755.5 -91.83 755.5 -91.83 4 cm LHe4 Kin Map
5 4454 3686.6 19.06 984.13 -19.55 875 -87.25 875 -87.25 4 cm LHe4 Kin Map
Retrieved from "https://hallaweb.jlab.org/wiki/index.php?title=Kinematics&oldid=8649"