Renamed "particle_vel" to "particle_mom" (#3672)

* Renamed particle_vel to particle_mom

* Changed vel to u

* Updated gitignore with vscode-specific folder

* Updated docs for single particle

* Revert "Updated gitignore with vscode-specific folder"

This reverts commit cb44ef8d66c123daa93d6a13d5a1d88416e866bb.

* Fixed typo

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Fixed other typo

* Add species indication in warning

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

2 files changed, 17 insertions, 17 deletions

diff --git a/Examples/Tests/photon_pusher/analysis_photon_pusher.py b/Examples/Tests/photon_pusher/analysis_photon_pusher.py
index 92d1e95f7..7518bd5ad 100755
--- a/Examples/Tests/photon_pusher/analysis_photon_pusher.py
+++ b/Examples/Tests/photon_pusher/analysis_photon_pusher.py
@@ -149,7 +149,7 @@ def generate():
             f.write('{}.injection_style = "SingleParticle"\n'.format(name))
             f.write("{}.single_particle_pos = {} {} {}\n".
                 format(name, init_pos[0], init_pos[1], init_pos[2]))
-            f.write("{}.single_particle_vel = {} {} {}\n".
+            f.write("{}.single_particle_u = {} {} {}\n".
                 format(name, velx, vely, velz))
             f.write("{}.single_particle_weight = 1.0\n".format(name))
             f.write("\n".format(name))
diff --git a/Examples/Tests/photon_pusher/inputs_3d b/Examples/Tests/photon_pusher/inputs_3d
index a9ff8ac7b..e2c75981e 100644
--- a/Examples/Tests/photon_pusher/inputs_3d
+++ b/Examples/Tests/photon_pusher/inputs_3d
@@ -28,112 +28,112 @@ p_xp_1.charge = -q_e
 p_xp_1.mass = m_e
 p_xp_1.injection_style = "SingleParticle"
 p_xp_1.single_particle_pos = 0.0 0.0 0.0
-p_xp_1.single_particle_vel = 1.0 0.0 0.0
+p_xp_1.single_particle_u = 1.0 0.0 0.0
 p_xp_1.single_particle_weight = 1.0
 
 p_xn_1.charge = -q_e
 p_xn_1.mass = m_e
 p_xn_1.injection_style = "SingleParticle"
 p_xn_1.single_particle_pos = 0.0 0.0 0.0
-p_xn_1.single_particle_vel = -1.0 0.0 0.0
+p_xn_1.single_particle_u = -1.0 0.0 0.0
 p_xn_1.single_particle_weight = 1.0
 
 p_yp_1.charge = -q_e
 p_yp_1.mass = m_e
 p_yp_1.injection_style = "SingleParticle"
 p_yp_1.single_particle_pos = 0.0 0.0 0.0
-p_yp_1.single_particle_vel = 0.0 1.0 0.0
+p_yp_1.single_particle_u = 0.0 1.0 0.0
 p_yp_1.single_particle_weight = 1.0
 
 p_yn_1.charge = -q_e
 p_yn_1.mass = m_e
 p_yn_1.injection_style = "SingleParticle"
 p_yn_1.single_particle_pos = 0.0 0.0 0.0
-p_yn_1.single_particle_vel = 0.0 -1.0 0.0
+p_yn_1.single_particle_u = 0.0 -1.0 0.0
 p_yn_1.single_particle_weight = 1.0
 
 p_zp_1.charge = -q_e
 p_zp_1.mass = m_e
 p_zp_1.injection_style = "SingleParticle"
 p_zp_1.single_particle_pos = 0.0 0.0 0.0
-p_zp_1.single_particle_vel = 0.0 0.0 1.0
+p_zp_1.single_particle_u = 0.0 0.0 1.0
 p_zp_1.single_particle_weight = 1.0
 
 p_zn_1.charge = -q_e
 p_zn_1.mass = m_e
 p_zn_1.injection_style = "SingleParticle"
 p_zn_1.single_particle_pos = 0.0 0.0 0.0
-p_zn_1.single_particle_vel = 0.0 0.0 -1.0
+p_zn_1.single_particle_u = 0.0 0.0 -1.0
 p_zn_1.single_particle_weight = 1.0
 
 p_dp_1.charge = -q_e
 p_dp_1.mass = m_e
 p_dp_1.injection_style = "SingleParticle"
 p_dp_1.single_particle_pos = 0.0 0.0 0.0
-p_dp_1.single_particle_vel = 1.0 1.0 1.0
+p_dp_1.single_particle_u = 1.0 1.0 1.0
 p_dp_1.single_particle_weight = 1.0
 
 p_dn_1.charge = -q_e
 p_dn_1.mass = m_e
 p_dn_1.injection_style = "SingleParticle"
 p_dn_1.single_particle_pos = 0.0 0.0 0.0
-p_dn_1.single_particle_vel = -1.0 -1.0 -1.0
+p_dn_1.single_particle_u = -1.0 -1.0 -1.0
 p_dn_1.single_particle_weight = 1.0
 
 p_xp_10.charge = -q_e
 p_xp_10.mass = m_e
 p_xp_10.injection_style = "SingleParticle"
 p_xp_10.single_particle_pos = 0.0 0.0 0.0
-p_xp_10.single_particle_vel = 10.0 0.0 0.0
+p_xp_10.single_particle_u = 10.0 0.0 0.0
 p_xp_10.single_particle_weight = 1.0
 
 p_xn_10.charge = -q_e
 p_xn_10.mass = m_e
 p_xn_10.injection_style = "SingleParticle"
 p_xn_10.single_particle_pos = 0.0 0.0 0.0
-p_xn_10.single_particle_vel = -10.0 0.0 0.0
+p_xn_10.single_particle_u = -10.0 0.0 0.0
 p_xn_10.single_particle_weight = 1.0
 
 p_yp_10.charge = -q_e
 p_yp_10.mass = m_e
 p_yp_10.injection_style = "SingleParticle"
 p_yp_10.single_particle_pos = 0.0 0.0 0.0
-p_yp_10.single_particle_vel = 0.0 10.0 0.0
+p_yp_10.single_particle_u = 0.0 10.0 0.0
 p_yp_10.single_particle_weight = 1.0
 
 p_yn_10.charge = -q_e
 p_yn_10.mass = m_e
 p_yn_10.injection_style = "SingleParticle"
 p_yn_10.single_particle_pos = 0.0 0.0 0.0
-p_yn_10.single_particle_vel = 0.0 -10.0 0.0
+p_yn_10.single_particle_u = 0.0 -10.0 0.0
 p_yn_10.single_particle_weight = 1.0
 
 p_zp_10.charge = -q_e
 p_zp_10.mass = m_e
 p_zp_10.injection_style = "SingleParticle"
 p_zp_10.single_particle_pos = 0.0 0.0 0.0
-p_zp_10.single_particle_vel = 0.0 0.0 10.0
+p_zp_10.single_particle_u = 0.0 0.0 10.0
 p_zp_10.single_particle_weight = 1.0
 
 p_zn_10.charge = -q_e
 p_zn_10.mass = m_e
 p_zn_10.injection_style = "SingleParticle"
 p_zn_10.single_particle_pos = 0.0 0.0 0.0
-p_zn_10.single_particle_vel = 0.0 0.0 -10.0
+p_zn_10.single_particle_u = 0.0 0.0 -10.0
 p_zn_10.single_particle_weight = 1.0
 
 p_dp_10.charge = -q_e
 p_dp_10.mass = m_e
 p_dp_10.injection_style = "SingleParticle"
 p_dp_10.single_particle_pos = 0.0 0.0 0.0
-p_dp_10.single_particle_vel = 10.0 10.0 10.0
+p_dp_10.single_particle_u = 10.0 10.0 10.0
 p_dp_10.single_particle_weight = 1.0
 
 p_dn_10.charge = -q_e
 p_dn_10.mass = m_e
 p_dn_10.injection_style = "SingleParticle"
 p_dn_10.single_particle_pos = 0.0 0.0 0.0
-p_dn_10.single_particle_vel = -10.0 -10.0 -10.0
+p_dn_10.single_particle_u = -10.0 -10.0 -10.0
 p_dn_10.single_particle_weight = 1.0
 
 # Diagnostics