Learn about Mu2e-II

Nominal Parameter values

Parameter	Nominal value	Units, Comments
PIP-II parameters
Beam energy (kinetic)	800	MeV
	1.28[math]\displaystyle{ \small{\times 10^{-10}} }[/math]	J
Particles/pulse	6.7[math]\displaystyle{ \small{\times 10^{12}} }[/math]
I_average in pulse	2	mA (5 mA peak)
Pulse length	550	[math]\displaystyle{ \small\mu }[/math]s
Pulse rep rate	20	Hz
Bunch pattern	programmable
Peak bunch size	2[math]\displaystyle{ \small{\times 10^8} }[/math]	(5 mA)
Bunch length	4	ps
RF frequency	162.5	MHz
	325	MHz
	650	MHz
Operation	40	wk/yr
Up time in operation	90	%
Mu2e-II parameters
Bunch frequency	81.25	MHz (assumes 1/2 of 162.5 available)
Calibration, background, special runs	30	%
CE data	70	%
Mu2e-II efficiency	100	%
CE run time/yr	1.5[math]\displaystyle{ \small{\times 10^{7}} }[/math]	s
Duration of run	4	yr
Total run time	6[math]\displaystyle{ \small{\times 10^7} }[/math]	s
Total linac reps	1.2[math]\displaystyle{ \small{\times 10^{9}} }[/math]
Extinction	1[math]\displaystyle{ \small{\times 10^{-11}} }[/math]	[1[math]\displaystyle{ \small{\times 10^{-13}} }[/math] for 100x safety margin]
Beam power	120	kW (100 kW nominal)
Number of bunches/spill	8	(at 81.25 MHz)
Spill width	100	ns
Production target parameters
Material
Power deposition		kW
Optimizable parameters for stopping target material
Aluminum stopping target
Spill period	1693	ns
Spills/linac rep	27770	approximate, at 20 Hz linac repetition rate
Protons/spill	1.6[math]\displaystyle{ \small{\times 10^{9}} }[/math]	(5 mA)
POT	5[math]\displaystyle{ \small{\times 10^{22}} }[/math]
Stopped mu/p	1.9[math]\displaystyle{ \small{\times 10^{-4}} }[/math]	rough estimate, TBC, assumes stopped mu/kW same at 800 and 8000 MeV among possibly other things
SES	<3[math]\displaystyle{ \small{\times 10^{-18}} }[/math]
E(conversion e-)	104.97	MeV
tau(muon)	864	ns
Lead stopping target
E(conversion e-)	94.9	MeV
Tracker
Resolution at 100 MeV
Calorimeter
Material
Energy resolution	5%	% (FWHM/2.36)
Time resolution	< 500	ps
Position resolution	10	mm
Radiation dose	10	kGy/yr
	[math]\displaystyle{ \small 1\times 10^{13} }[/math]	n/cm[math]\displaystyle{ \small{^2} }[/math] (total 1 MeV equivalent)
Cosmic Ray Veto
Trigger/DAQ
Event size	1	MB
Tape storage	14	PB/yr