Advanced Photon Source

An Office of Science National User Facility

Low Energy Transport Lines

Drawings

Tables

  • LTP (Linac to PAR) Transport Line
  • PTB (PAR to Booster) Transport Line
2.2 LTP (Linac to PAR) Transport Line

The first section of the 450-MeV positron beam transport line from the positron linac to the PAR contains 10 quadrupoles and one bending dipole.

Parameters of the low energy transport line between linac and PAR are given below.

2.2.1 Magnets
Dipoles    
Number 1  
Magnetic Length 0.4 m
Bending Angle 0.2 rad
Field 0.75 T
Quadrupoles    
Number 10  
No. of independent power supplies 10  
Magnetic Length 0.3 m
Max gradient 12.7 T / m
Pole tip inscribed radius 32 mm
2.2.2 Beam Diagnostics (number of each type)
2.2.2 Beam Diagnostics (number of each type)
Current monitor 1
Position monitors 4 per plane
Loss monitor 1
Fluorescent screens 3
LTP parameters for beam diagnostics
Peak Current (linac output) 8 mA
Bunch length (from linac) 30 ns
Intensity per pulse 1.5 x 109 e+
Charge per pulse 240 pC
Number of pulses 24  
Pulse repetition rate 60 Hz
2.4 PTB (PAR to Booster) Transport Line

The second section of the 450-MeV positron beam transport line from the PAR to the injector synchrotron (also known as booster) contrains 11 quadrupoles and two horizontal bends.The two bends in opposite polarities form an achromatic horizontal parallel translation together with four quadrupoles.

Parameters of the low energy transport line from PAR to injector synchrotron (or booster) are given below.

2.4.1 Magnets
Dipoles    
Number 2  
No. of independent power supplies 2  
Magnetic Length 0.4 m
Bending angle 0.2 rad
Field 0.75 T
Bending angle 0.187 rad
Field 0.703 T
Quadrupoles    
Number 11  
No. of independent power supplies 11  
Magnetic length 0.3 m
Max gradient 12.7 T / m
Pole tip inscribed radius 32 mm
2.4.2 Beam Diagnostics (number of each type)
Current monitor 1
Position monitors 5 per plane
Loss monitor 1
Fluorescent screens 3
PTB parameters for beam diagnostics
Peak current (assume Gaussian bunch) 7.92 A
Bunch length (from the PAR) 0.29 ns
Intensity per bunch, at 100% efficiency 3.6 x 1010 e+
Charge per pulse, at 100% efficiency 5.76 nC
Pulse repetition rate 2 Hz