title background cosmic ray ionization by suprathermal electrons only
c
c commands controlling continuum =========
c background CR H0 ionization rate should be 2.5e-17 s^-1,
c Williams et al. ApJ, 503, 689
cosmic rays, background
c this will be VERY faint black 50000
ionization parameter -25
black 50000 
c
c commands for density & abundances =========
hden 5
c
c commands controlling geometry  =========
set dr 0 
stop zone 1
c
c other commands for details     =========
iterate
set temperature floor 1000 K
c turn off molecules to test only ions 
no molecules 
c must turn off charge transfer and its heating, which would dominate,
c since we want to test cr heating and ionization
no charge transfer
no ctheat
c must turn of  photoionization by recombining species,
c since we want to test cr heating and ionization
no photoionization
c any time photoionization is turned off, it is best to also
c turn off induced processes, which include pumping in the lyman lines
no induced processes
c
c commands controlling output    =========
print ages
// >>chng 01 may 11, model was changed to test only secondary ionization,
// its intended purpose
save overview "ism_cosmicray.ovr"
save performance "ism_cosmicray.per"
save monitors "ism_cosmicray.asr" last
c
c commands giving the monitors    =========
// >>chng 04 jan 26, from -0.180 to 0.0683, update cr background
// >>chng 12 apr 09, from 0.0683 to 0.5225, update CR backbround to Indriolo+07, ~8x larger
monitor eden 0.5225 0.07
//
// this is log of rate in TH85, Table 10, including factor of 0.46,
// since this is total H ionization, not exactly their value since
// not exactly low-elec fraction limit
// >>chng 02 apr 02, from -17.098 to -17.060, better bound compton
// >>chng 04 jan 26, from -17.060 to -16.603 update cr background
// >>chng 04 mar 26, from -16.602 to -16.633, update cr sec2prim ratio for 35 ev
// >>chng 04 apr 16, from -16.633 to -16.60, chng scal fac for back, incr err
// >>chng 12 apr 09, from -16.6 to -15.7, update CR backbround to Indriolo+07, ~8x larger
monitor csupra -15.7 error 0.1
//
// total heating
// uncertain since depends on collider density
// >>chng 04 jan 26, from -23.750 to -23.289 update cr background
// >>chng 04 jan 28, from -23.289 to -21.935 update cr heating background
// >>chng 04 mar 24, from -21.935 to -22.676, heatef onto cr heat
// >>chng 04 apr 16, from -22.676 to -22.65, chng scal fac for back, incr err
// >>chng 11 nov 16, from -22.650 to -22.603, adjust newmole monitors
// >>chng 12 apr 09, from -22.603 to -21.705  update CR backbround to Indriolo+07, ~8x larger
monitor htot  -21.705  error 0.1
//
// >>chng 04 mar 15, add cr heating by itself
// >>chng 04 mar 24, from -21.935 to -22.676, heatef onto cr heat
// >>chng 04 apr 16, from -22.676 to -22.64, chng scal fac for back, incr err
// >>chng 12 apr 09, from -22.64 to -21.7, update CR backbround to Indriolo+07, ~8x larger
monitor line "cr h" 0  luminosity -21.7 error 0.1
//
// >>chng 04 jan 26, from -5.219 to -4.973 update cr background
// >>chng 04 mar 24, from -4.773 to -4.973, update cr heating
// >>chng 12 apr 09, from -4.973 to -4.522, update CR backbround to Indriolo+07, ~8x larger
monitor ionization hydrogen 2 -4.522
//
// >>chng 02 dec 11, from -5.254 to -5.206, new hei
// >>chng 04 jan 26, from -5.206 to -4.971 update cr background
// >>chng 04 apr 16, from -4.971 to -4.94, chng scal fac for back, incr err
// >>chng 12 apr 09, from -4.94 to -4.492, update CR backbround to Indriolo+07, ~8x larger
monitor ionization helium 2 -4.492 error 0.1
//
// >>chng 04 jan 26, from -5.315 to -5.069 update cr background
// >>chng 06 feb 07, from -5.069 to -5.036, add exp to low-T DR 
// >>chng 06 mar 05, from -5.036 to -8.646, NA add C+ - (Mg0 Fe0) CT
// >>chng 08 dec 15, from -8.646 to -5.080, prev chg reversed; CT now properly killed
// >>chng 11 jul 12, from -5.08 to -5.049, enable fit to Badnell DR suppression
// >>chng 12 apr 09, from -5.049 to -4.596, update CR backbround to Indriolo+07, ~8x larger
// >>chng 13 feb 02, from -4.596 to -4.632, BUGFIX, largely undo r6703 
monitor ionization carbon 2 -4.632
//
// >>chng 04 jan 26, from -5.544 to -5.297 update cr background
// >>chng 06 mar 05, from -5.297 to -7.789, NA add C+ - (Mg0 Fe0) CT
// >>chng 08 dec 15, from -7.789 to -5.296, prev chg reversed; CT now properly killed
// >>chng 11 jul 12, from -5.296 to -5.11, update to head of branch, without new coll DR suppression
// >>chng 11 jul 12, from -5.11 to -5.088, enable fit to Badnell DR suppression
// >>chng 12 apr 09, from -5.088 to -4.636, update CR backbround to Indriolo+07, ~8x larger
// >>chng 12 jul 01, from -4.636 to -5.148, update Badnell DR to 13-electron iso sequence
// >>chng 13 feb 02, from -5.148 to -5.314, BUGFIX, largely undo r6703 
monitor ionization silicon 2 -5.314
//
// >>chng 03 aug 15, from -4.969 to -5.055, add guess for low-T dr
// >>chng 04 jan 26, from -5.055 to -4.826 update cr background
// >>chng 06 feb 07, from -4.826 to -4.765, add exp to low-T DR 
// >>chng 11 apr 22, from -4.765 to -4.847, update Ar sequence Badnell DR rates
// >>chng 11 jul 12, from -4.847 to -4.806, enable fit to Badnell DR suppression
// >>chng 12 apr 09, from -4.806 to -4.352, update CR backbround to Indriolo+07, ~8x larger
// >>chng 13 feb 02, from -4.352 to -4.381, BUGFIX, largely undo r6703 
monitor ionization iron 2 -4.381
//
c ism_cosmicray.in
c class limit 
c ========================================
c 

This test conditions of cosmic ray ionization.  Molecules and charge transfer
are disabled so that analytical estimates can be made.