Official Production

This page collects all the information related to the official simulation production of NEXT detectors.

Warning

This webpage is still under construction. If you would like to contribute, reach me!

NEXT-100 (16-02-2026)

This production can be found in neutrinos1.ific.uv.es

This dataset includes multiple simulations processed for krypton and high energy at 4 bar, all found on the neutrinos cluster (neutrinos1.ific.uv.es), at directory /lustre/neu/data4/NEXT/4bar/:

nexus:	v07_10_01
nexus: LTs and PSFs for Detsim	v07_10_01_Jan2026
IC	f61e3945f449b094590cdf1e708419c15f628fe0
NEXT-100 Background Model	-

Folder name	Type	Description	Processed:
kr_202602/	Kr 83m - Fast sim [1]	3.5M events in NEXT100 active volume, 800k events kept at hypathia level.	nexus, detsim, hypathia, dorothea
kr_202601_full/	Kr 83m - Full sim	1.7M events.	nexus, hypathia, dorothea
th_port1a_202602/	Th 228 - Fast sim	~850k events within 1-2.8 MeV energy window	nexus, detsim, hypathia, sophronia
th_port1a_dep_202602/	Th 228 - Fast sim	~1.5M events within 1.45-1.65 MeV energy window (DEP).	nexus, detsim, hypathia, sophronia
th_port1a_dep_202602_full/	Th 228 - Full sim	~19k events within 1.45-1.65 MeV energy window (DEP). 900 events at buffy/hypathia level.	nexus, buffy, hypathia, sophronia

[1]

Includes Kr map: kr_map_MC_202602.krmap

NEXT-100 (20-10-2025)

This dataset includes multiple simulations processed for krypton and high energy at 4 bar, all found at /lustre/neu/data4/NEXT/4bar/:

nexus:	-
nexus: LTs and PSFs for Detsim	-
IC	-
NEXT-100 Background Model	-

Folder name	Type	Description	Processed:
kr_202503_fullsim/	Kr 83m - Full sim	200k events in NEXT100 active volume. 50ms electron lifetime	nexus, hypathia, dorothea
kr_202502_fullsim/	Kr 83m - Full sim	200k events in NEXT100 active volume. 1000ms electron lifetime	nexus, hypathia, dorothea
kr_202510_fullsim/	Kr 83m - Full sim	1M events in NEXT100 active volume.	hypathia, dorothea
th_port1a_202509/	Tl 208 - Fast sim	1.63M events within 1-2.8 MeV energy window	nexus, sophronia

NEXT-100 (30-10-24)

A dataset using fast simulations has been produced for two different vessel pressures: High Pressure Run (HPR) with 13.5 bar and Low Pressure Run (LPR) with 5 bar.

The highlights of this production (distinct from the first production) are:

• More statistics for the High Energy calibration and radiogenics at HPR.

• First Kr and High Energy calibration data at LPR.

Some information about the LPR production (changes in electron diffusion, drift velocity and gain parameters, nexus efficiencies…) can be found in this talk

The data was produced using:

nexus:	v7_03_01
nexus: LTs and PSFs for Detsim	v7_01_00(+ G4 op bug)
IC	pre_v2_step0 tag, from PR#842
NEXT-100 Background Model	v4

All LTs and PSFs for Detsim are reused from the previous production. For LPR they were used as a first approach since they are not made yet, but Kr map and deconvolution PSF were created with the new Kr calibration data.

This production can be found in neutrinos1.ific.uv.es under the following path:

/data4/NEXT/NEXT100_production/

And the general hierarchy:

pressure_run
├── LightTables
└── prod_type
        ├── config_templates
        └── isotope
                └── volumes
                        └── production

Where:

• pressure_run: two different folders, HPR or LPR depending on the pressure of the vessel.

• LightTables: contains the LTs and PSFs used for Detsim, the Kr map used for the energy corrections and the deconvolution PSF.

• prod_type: the type of data, can be HE_calib (High Energy calibration), Kr_calib (Kripton calibration) or radiogenics, among others to be added in a future.

• config_templates: contains the configuration files used for nexus and IC.

• isotope: the name of the simulated isotope, can be ²¹⁴Bi or ²⁰⁸Tl for radiogenics, for example.

• volumes: nexus volumes where the isotope was simulated, such as ACTIVE for the Kr calibration, the different calibration ports for HE calibration, or the NEXT-100 detector components for radiogenics.

• production: contains the nexus and IC files, divided in folders by city.

NEXT-100 (first production)

A first production using fast simulations (Detsim) has been produced using

nexus: radiogenics + signal	v7_02_00
nexus: muons	v7_03_00
nexus: LTs and PSFs for Detsim	v7_01_00(+ G4 op bug)
IC	8e1de90c1cec5a1c3d25b35eca456f87f4f7e64c
IC: muons	PR#823
NEXT-100 Background Model	v4

This production can be found in neutrinos1.ific.uv.es under the following path:

/data4/NEXT/NEXT100_prod/

Nexus macros for the current production can be found on GitHub here.

Detsim light tables (LTs) and point spread functions (PSFs) can be found in neutrinos1.ific.uv.es in

Note: these files disappeared due to an incident in the neutrinos cluster.
This is just for reference.
/data4/NEXT/NEXT100_prod/LightTables/ (for productions before May 2024)
/lustre/neu/data4/NEXT/NEXT100/MC/Tables/202405_Krishan (for productions after May 2024)

Config files for the rest of the production chain can also be found on here on Github.

NEXT-White

Latest official production was generated using

nexus	v5_07_00/v5_07_01
detsim	v0_09_01
IC: diomira, irene, and dorothea	v1.1.0
IC: penthesilea	v1.2.0
IC: isaura	v1.2.alberto
Background Model	v9

It can be found in neutrinos1.ific.uv.es under the following path:

/lustre/neu/data4/NEXT/NEXTNEW/MC/

For the different productions the corresponding latest tags are:

Production	Folder
0nubb	NEXT_v1_05_02_NEXUS_v5_07_00_bkg_v9
Xe2nu	NEXT_v1_05_02_NEXUS_v5_07_01_bkg_v9
Calibration	NEXT_v1_05_02_NEXUS_v5_07_01_bkg_v9
NEW Background Model	NEXT_v1_05_02_NEXUS_v5_07_01_bkg_v9

Output hdf5 files together with the corresponding config files used to run each of the cities can be found there. E.g. the background production of deconvoluted hits (cdst) can be found in

/lustre/neu/data4/NEXT/NEXTNEW/MC/Background/NEXT_v1_05_02_NEXUS_v5_07_01_bkg_v9/cdst/output

Where the following config files have been used,

/lustre/neu/data4/NEXT/NEXTNEW/MC/Background/NEXT_v1_05_02_NEXUS_v5_07_01_bkg_v9/cdst/conf

Note

It is important to stress some aspects regarding the production:

• The production is based on the v9 version of the background model. The details of the model can be found here.

• The two versions of nexus (v5_07_00 and v5_07_01) are identical but for an update concerning the calibration ports.

• The detsim package refers to the c++ and art version. The repository may be found here.

• The EventMixer package refers to the gate version. The repository may be found here.

• The IC package is considered in different versions since the goal is to match the official Canfranc production for data (v1.1.0). However, several updates implied the usage of more recent versions, even a custom one before the officialization of ìsaura.