Beamline Meetings

Weekly remote Zoom meetings on Thursdays at 9:00am

Join ZoomGov Meeting
https://jlab-org.zoomgov.com/j/1606674688?pwd=b3dnTzJWVEtxZExGRnFoY29PSGkxQT09

Meeting ID: 160 667 4688
Passcode: 709878

Pages for the KLF new beamline components

Table: KLF beamline basic parameters inside and after collimator cave (green background means the parameter is defined).
Paramater	Value	Comment
Radiator thickness (z)	0.2 X₀	Made of copper (2.87mm)
Be target length (z)	40cm
KPT upstream γ-beam channel width (x&y)	14cm	Rectangular (square cross section)
Be target diameter	7cm	Cylindrical (circular cross section)
Tungsten plug length (z)	14cm	90/10 W/Cu, ρ=16.5 g/cm³
Tungsten plug width (x&y)	14.2cm	Rectangular (square cross section)
KPT downstream K_L-beam channel width (x&y)	6.7cm	Rectangular (square cross section)
Beam pipe diameters	??cm	Needs optimizing
Beamline shielding wall	??	Needs optimizing
Sweeping magnetic field	0.82 (T•m)	\|B_x\|=0.23T inside the gap
PS magnetic field	1.65 (T•m)	\|B_x\|=1.8T inside the gap
LH2 target length (z)	~40cm	May not be final
LH2 target diameter	6cm

Table: KLF electron beam specifications (pink background means the specs are not defined)
Beam Paramater	@ CPS radiator	@ KPT entrance
Beam current	50 nA ≤ I_B ≤ 5 μA	N/A
Beam emmitances	ε_x,y ≤ 20 nm-rad	Ν/Α
Beam spot size	σ_x,y = 1.2 mm, (0.8 mm ≤ σ_x,y ≤ 1.5 mm)	σ_x,y ≤ 1 cm
Beam position stability (@ 1 Hz)	σ_x,y ≤ 0.2 mm	σ_x,y ≤ 2 mm
Beam halo (halo-to-peak)	< 10⁻⁴ at r ≥ 5σ_x,y	N/A
Beam excursion limits in FSD	Δ_x,y ≥ 1 mm	Δ_x,y ≥ 1 cm
Bleedthrough from out-of-time bunches	Specs undefined	N/A