title HII region with negative He/H ICF
c
c commands controlling continuum =========
c this is the result of this command
c table star mihalas 46000
c and makes it possible to run these orion sims without
c installing the stellar atmosphere files 
table read "star_mihalas_46000.dat" 
ionization parameter -2.
c add the CMB after hot star shape & luminosity specified
CMB 
c
c commands for density & abundances =========
hden 3
init file "ism.ini"
abundances ism no grains
grains no qheat single 
metals and grains 0.320
c
c commands controlling geometry  =========
// >>chng 05 mar 13, from -4 to -3, had gone into mole cloud
// precise stop depended on chemistry
stop efrac -3
stop temperature 15
sphere
c
c other commands for details     =========
failures 1
c
c commands controlling output    =========
save performance "hii_icf.per"
save overview "hii_icf.ovr" last
save monitors "hii_icf.asr" last
save dr "hii_icf.dr" last
c
c commands giving the monitors    =========
// >>chng 04 jun 12, from -0.013 to -0.0038 chng cont shield fcn
// >>chng 04 dec 08, from -0.0038 to -0.0137, co-ion feedback, check converg
// >>chng 05 feb 18, from -0.0137 to -0.0038 incld outwrd cont in line pump
// fast gets -0.0137, slow gets -0.0038 
// >>chng 05 mar 13, from -0.0038 to -0.0141, chng stop criteria
// >>chng 09 feb 23, from -0.0141 to -0.0119, remove otslin, otscon dampers (PR #84, r2758)
monitor HHeicf -0.0119 error 0.002
//
// this was typical before grain recom put in
// >>chng 04 sep 18, from 450 to 530, better mole conv chk
// >>chng 05 mar 13, from 530 to 400, chng stop criteria
// >>chng 08 dec 08, from 400 to 322, upper limit -> equals (r2515)
// >>chng 08 dec 13, from 322 to 332, merging newsolvers branch
// >>chng 09 jan 08, from 332 to 329, minor changes in iter/zn, iterations, and zone that crept in over last month
// >>chng 09 jan 16, from 329 to 329 (error 0.02), average of 10 runs
// >>chng 11 dec 18, from 329 to 335, adjust outstanding botches
monitor nzone 335 error 0.02
//
c hii_icf.in
c class hii 
c ========================================


This is an example of an H II region irradiated
by a hard stellar continuum - one of the Mihalas NLTE stars.
The hard continuum produces a negative He/H ionization
correction factor, as discussed in Ballantyne, Ferland & Martin (2000).
>>refer	HeI	icf by Ballantyne,D.R.,  Ferland, G.J., & Martin, P.G., 2000, ApJ 536, 773-777