Lya maser blocked from inverting 21 cm (trac #74)

cloudy-bot commented 16 years ago

reported by: @CloudyLex

sim hlike_o.in is very highly ionized and Lya photon occupation number is negative - line is masing. introduced code at atom_hyperfine.cpp:68 to detect this and set to zero. negative populations occur if this is not done. level solver needs to be improved to return maser in 21 cm rather than negative pops

Migrated from https://www.nublado.org/ticket/74

{
    "status": "reopened",
    "changetime": "2019-06-12T11:51:18Z",
    "_ts": "1560340278069195",
    "description": "sim hlike_o.in is very highly ionized and Lya photon occupation number is negative - line is masing.  introduced code at atom_hyperfine.cpp:68 to detect this and set to zero.  negative populations occur if this is not done.  level solver needs to be improved to return maser in 21 cm rather than negative pops",
    "reporter": "gary",
    "cc": "",
    "resolution": "",
    "time": "2008-07-28T06:42:23Z",
    "component": "radiative transfer",
    "summary": "Lya maser blocked from inverting 21 cm",
    "priority": "minor",
    "keywords": "21 cm Lya maser",
    "version": "",
    "milestone": "no milestone",
    "owner": "gary",
    "type": "physics"
}

cloudy-bot commented 16 years ago

@ commented:

Milestone C09 deleted

@ changed milestone from "C09" to ""

cloudy-bot commented 16 years ago

@peter-van-hoof-noaccount changed milestone from "" to "no milestone"

cloudy-bot commented 16 years ago

@mchatzikos commented:

The sim hlike_o.in does not fail as it did 11 years ago. In fact, the note emitted at atom_hyperfine.cpp:92 is never triggered in the test suite. Other tests aimed to force Lya to mase did not manage so.

@mchatzikos changed resolution from "" to "fixed"
@mchatzikos changed status from "new" to "closed"

cloudy-bot commented 16 years ago

@mchatzikos changed attachment from "" to "lya-maser.in"
@mchatzikos commented:

Constant density and temperature H-only gas with laser shortward of Lya.

cloudy-bot commented 16 years ago

@mchatzikos commented:

Reopening ticket to change its closing status.

@mchatzikos changed resolution from "fixed" to ""
@mchatzikos changed status from "closed" to "reopened"

cloudy-bot commented 16 years ago

@mchatzikos changed resolution from "" to "worksforme"
@mchatzikos changed status from "reopened" to "closed"

cloudy-bot commented 16 years ago

@mchatzikos commented:

The problem was due to stale escape probabilities, and it was fixed at r2913.

cloudy-bot commented 16 years ago

@mchatzikos changed resolution from "worksforme" to ""
@mchatzikos changed status from "closed" to "reopened"

cloudy-bot commented 16 years ago

@mchatzikos changed resolution from "" to "fixed"
@mchatzikos changed status from "reopened" to "closed"

cloudy-bot commented 16 years ago

@peter-van-hoof-noaccount changed _comment0 from:

The test suite run on the trunk at r12776 revealed that tsuite/programs/hizlte failed:

An assert has been thrown, this is bad. Failed: occnu_lya >= 0. It happened in the file atom_hyperfine.cpp at line number 126

This is a result of r12770 making a previously non-fatal error into a fatal one. This implies we now have a working example of a sim that produces masing in Lya.

Reopening the ticket as the reported problem is not fully solved yet.

to:

1560340278069195

@peter-van-hoof-noaccount commented:

The test suite run on the trunk at r12776 revealed that tsuite/programs/hizlte failed:
 An assert has been thrown, this is bad.
 Failed: occnu_lya >= 0.
 It happened in the file atom_hyperfine.cpp at line number 126
This is a result of r12770 making a previously non-fatal error into a fatal one. This implies we now have a working example of a sim that produces masing in Lya.

Reopening the ticket as the reported problem is not fully solved yet.

@peter-van-hoof-noaccount changed resolution from "fixed" to ""
@peter-van-hoof-noaccount changed status from "closed" to "reopened"

cloudy-bot commented 16 years ago

@mchatzikos changed attachment from "" to "lya-failing.in"
@mchatzikos commented:

Failing sim, extracted from tsuite/programs/hizlte.

cloudy-astrophysics / bug-tracker-migration-test

Lya maser blocked from inverting 21 cm (trac #74) #77