Kyle's Log

Progress and Task Log for Kyle

Tasks

• Get tasks from Maurik
• Learn the XML, build a primer so we can set up simple test strips.
• Collaborate with dan for a 'Building Sim 12' page, once we can consistently build it.
• Track bugs and crashes of Sim12.
• Build a batch mode guide with common commands. -
• Build a clean and actually readable version of http://clasweb.jlab.org/wiki/index.php/Sim12_Manual.

In Progress

Batch mode guide comming along well, 80% of what we are doing right now is in the short list at the top. Gui manipulation is coming along with dan. More sections will be added.

I can put together things already defined like SVTs, but what about single strips? Not implemented yet? XML guide is very basic, clean and clear up a little bit. Cant stress HDDS-1_0.xsd enoung. (In your Sim12 directory) The XML seems like a great system, glad you choose to go with HDDS.

Reading about detector theory, particle physics. Seiden's 'Particle Physics' in the office, gettting Griffith's. Ask Maurik for book recommendations.

Notes

Hits not implemented at all? To make materials active, flag them as sensitive="true". No actual hit tracking yet? Needs to out to a file.

Sim12 should be able to out the entire session, all text displayed in the terminal to a text file.

Need to add all particles to the menu in Sim12 gui, need an option to set energy. Maybe a command line to hybridize batch/gui mode? XML file selector?

Sim12 registers and interprets optical photon detection, giving you mass, velocity, direction, etc. Haven't seen it for anything else.

Colors!

Energy independent.

Red = leptons? e-, e+, mu-

Green = gamma rays, neutron, nu_e, nu_mu, optical photon

Blue = ??? pi+, proton

Yellow = ???

Pink = ???

Maybe seperated into classes like charge, optical or other wavelength photons, etc...

Log

October

Tue 23

Off clock - building Sim12 on Fedora 7, some linking errors with JGeant4

Arrived 12pm
Familiarizing with batch mode, xml files
Put together common batch mode commands from http://clasweb.jlab.org/wiki/index.php/Sim12_Manual.
Creating log for hours, things done.
Read SVT and silicon detector papers
Out 3:00pm

tonight: more reading, fix linking problem

Thur 25

Off clock - picking up Introduction to Elementary Particles by Griffiths today or tomorrow.

Arrived 12pm
Reading through HDDS-1_0.xsd - XML documentation
Put together a simulation with just 2 SVTs (or maybe 1 double layered SVT) and a target.
Simulation runs a LOT faster with reduced geometry.

Wrote XML guide.
Left 2:45pm

Fri 26

Off clock - picking up Introduction to Elementary Particles by Griffiths today or tomorrow.

Arrived 10am
Set up single 'strip' simulation. Trying to figure out color meaning.
Color crazy! Perhaps seperated by charge, optical or 'other' emag radiation. All leptons so far are red.
Note: I do not get the vertical red lines I did when first running the simulation. Perhaps there is too
much geometry when the entire site is loaded and it breaks?

Applying fields to the region. (Uniform) Seem to have some effect on charged particles in jets but not
in incoming beam...not much of an effect though. Need to run more tests, check field strength. I don't think
it's doing anything.

Rotation in the phi dimension is broken for theta = 0.

Sim12 registered hit for an optical photon, gave lots of nice information. Hasn't done that for other
particle hits. Trying to get Sim12 to dump particle info to a file rather than just the terminal.
Out - 12:30pm

November

Mon 5

Arrived 10:30AM
Will G4 simulate semicondcutor SVT? - should...simulates photoelectric effect
Building detector piece as descriped in the diagrom in the SVT notes. Fixing geometry.
Out 12:15PM

Wed 7

Arrived 10:00AM
It seems references to geometry in the xml files use the center of a volume for it's
referencing index. I've built the first layer of the SVT cross section. What are we
using for n, n+, and p+? Spoke to Sam about this, he will get back to me.

For the laser test-bed we are trying to assemble:
Is this laserlight polarized? Geant4 cannot yet simulate
polarized light.

Trying to simulate photoelectric effect.
-what is the opticalphoton wavelength
Out 12:30pm

Fri 9

Arrived 10:15AM
Met with Sam on thursday, he recommended a great detector book, explaining the + designation on p and n semiconductors.
I spoke with grad student Georgi Nenchev on Solid State physics, and he recommended I pick up a book.
Modeling SVT from the cross section.