[Mesa-users] Question about scaling carbon rates

[Rob Farmer]

You'll need to do a restart or manipulate the s% rate_factors array
directly in your run_star_extras (See set_rate_factors in
star/job/run_star_support.f90)

Or just use approx21 from the beginning and not worry about this.

Rob

On Fri, 29 Jul 2022 at 11:14, Jeremy Sakstein <sakstein at hawaii.edu> wrote:

> Thanks Rob,
>
> So if I have the rate scaled at the start of the run in my inlist then
> will that scaling take place once approx21 turns on automatically later or
> do I need to stop and restart with a new inlist to scale the rate?
>
> Cheers,
>
> Jeremy
>
> On Thu, Jul 28, 2022 at 11:10 PM Rob Farmer <robert.j.farmer37 at gmail.com>
> wrote:
>
>> HI,
>>
>> This is where inlists become helpful :)
>>
>> >Is this because approx21 is not turned on until later?
>>
>> I assume then you're not expliciting changing your network then? Then
>> yes, you'll pick up basic.net first and then approx later, and basic.net
>> doesn't do carbon burning.
>>
>> Rob
>>
>>
>> On Fri, 29 Jul 2022 at 10:20, Jeremy Sakstein <sakstein at hawaii.edu>
>> wrote:
>>
>>> Thanks Rob,
>>>
>>> I also tried 'r1212' after I sent the email and this also did not
>>> produce the message at the start of the run
>>>
>>> Is this because approx21 is not turned on until later?
>>>
>>> Cheers,
>>>
>>> Jeremy
>>>
>>> On Thu, Jul 28, 2022 at 10:18 PM Rob Farmer <robert.j.farmer37 at gmail.com>
>>> wrote:
>>>
>>>> Hi
>>>> Which rate you need depends on your choice of nuclear network. Use
>>>> show_net_reactions_info = .true. in star_job to see the full detailed list.
>>>>
>>>> I'm guessing you are using an approx net? in which case you want r1212
>>>>
>>>> > rates/private/rates_names.f90
>>>>
>>>> I'm glad you're looking into the code, unfortunately many rates aren't
>>>> listed in the code explicitly as they get generated at runtime so you'll
>>>> need to use show_net_reactions_info. Only reactions that need some sort of
>>>> special handling are listed in the code.
>>>>
>>>> Rob
>>>>
>>>>
>>>> On Fri, 29 Jul 2022 at 03:11, Jeremy Sakstein <sakstein at hawaii.edu>
>>>> wrote:
>>>>
>>>>> Hi everyone,
>>>>>
>>>>> I would like to scale the C12_C12 reactions i.e., the carbon burning
>>>>> processes but can't seem to find the correct rate.
>>>>>
>>>>> I tried r_c12_c12 and didn't get the notification in the terminal
>>>>> output. Same thing with rc12c12.
>>>>>
>>>>> It occurred to me that I may have to scale each rate individually so I
>>>>> looked through rates/private/rates_names.f90 (I'm using version 15140) and
>>>>> found two of the reactions so now I have:
>>>>>
>>>>>     num_special_rate_factors=2
>>>>>     reaction_for_special_factor(1)='r_c12_c12_to_h1_na23'
>>>>>     special_rate_factor(1)=1d-10
>>>>>     reaction_for_special_factor(2)='r_c12_c12_to_he4_ne20'
>>>>>     special_rate_factor(2)=1d-10
>>>>>
>>>>> in my inlist but this still does not give the message saying that a
>>>>> special rate is being used.
>>>>>
>>>>> Is someone able to tell me the correct rates to scale to turn off C
>>>>> burning?
>>>>>
>>>>> Cheers,
>>>>>
>>>>> Jeremy
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Jeremy Sakstein (He/Him/His)
>>>>> Assistant Professor of Theoretical Physics
>>>>> Department of Physics & Astronomy
>>>>> University of Hawaiʻi at Mānoa
>>>>> Watanabe Hall
>>>>> 2505 Correa Road
>>>>> Honolulu, HI, 96822, USA
>>>>> http://www.jeremysakstein.com
>>>>> _______________________________________________
>>>>> mesa-users at lists.mesastar.org
>>>>> https://lists.mesastar.org/mailman/listinfo/mesa-users
>>>>>
>>>>>
>>>
>>> --
>>> Jeremy Sakstein (He/Him/His)
>>> Assistant Professor of Theoretical Physics
>>> Department of Physics & Astronomy
>>> University of Hawaiʻi at Mānoa
>>> Watanabe Hall
>>> 2505 Correa Road
>>> Honolulu, HI, 96822, USA
>>> http://www.jeremysakstein.com
>>>
>>
>
> --
> Jeremy Sakstein (He/Him/His)
> Assistant Professor of Theoretical Physics
> Department of Physics & Astronomy
> University of Hawaiʻi at Mānoa
> Watanabe Hall
> 2505 Correa Road
> Honolulu, HI, 96822, USA
> http://www.jeremysakstein.com
>
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