Ryan showing his work getting madx running

Q: Super tiny beta functions ~3-4cm + very strong magnets (~20T). Can MadX actually handle situations like that → Eliana thinks yes
Q: Does madX care about energy? → no but if you want to compute synchrotron radiation then you must specify the particle/energy
Eliana will send tips on an easier way to specify drift lengths

describe beam line this is inconvenient (have to compute drift by yourself). with bending magnet you must specify bending magnet lengths and cord lengths
if you don’t specify the drift length (then use a different kind of input, eg. just specify the center of the magnet x position and have madX compute the drift length itself)
If you have a very periodic structure, the way ryan was doing this might be more helpful, but for us we have a fairly short structure

PTC - is an old code that does particle tracking, seems to not be reliable/easy to use
Otherwise you need to use thin structures to do tracking, which doesn’t play nicely with the thick structures (like magnets)
It’s much easier to do the matching/magnet optimization in MadX, implement magnets with those parameters into G4Beamline, and do particle tracking in G4Beamline
Input to MadX: betatron functions
Input to G4Beamline: individual particles in a beam
Need code to go from one to the other (Daniel mostly has this already)

Go through the first wedge G4beamline w/ particle tracking
Compute the beta functions & input to MadX
Perform the matching in MadX (save and check output beta functions)
Implement/update magnets in G4beamline
Perform particle tracking through magnets & second wedge in G4beamline (compute & cross check output beta functions w/ MadX)
(Sounds like learning about MadX python bindings might be useful for automatic all of this)

Try a matching situation (large beta → small beta or the reverse)
Go through a drift (put magnets at locations downstream) / vary strength of magnets until you get a match of the betatron functions

For a given beta function, create corresponding beam
Implement the magnets in G4beamline & pass the beam through the magnets
Run particle tracking & compute resulting beta distributions
Make sure beta distributions correspond to what you found with MadX
Things to keep in mind (how quads are specified, signs, normalized/unnormalized beta distributions)

Additional discussion

protons you have nuclear interactions (depending on energy is it closer → low momentum protons because some nuclear interactions are reduced. but then not relativistic)
electrons you have brem/electrons stopped in materials
200 MeV muons ~ 10 MeV protons

Things you could test with protons - intensity effects/break down in RF cavities

breakdown in RF cavities was studied at MTA at fermilab
adding a beryllium coating reduced breakdown
cause of breakdown is dE/dx, energy results in damage to the material of the cavity
wanted to test aluminum and diamond windows becuase they also have low Z, and are easier to manufacture

IPAC

Plans for the summer