Learn about Mu2e-II
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| 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 | |
| Mu2e-II parameters | ||
| Bunch frequency | 81.25 | MHz (assumes 1/2 of 162.5 available) |
| Run time/yr | 2[math]\displaystyle{ \small{\times 10^{7}} }[/math] | s |
| Duration of run | 3 | 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 | 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 |