Emit once a group of Particle System

Hi, My problem is this one : (I already tried to find a solution since 2 days on many forum but without success)

I have a particle system with children wich are particles to.

My goal is to emit all of them only once, everytime a bool is true.

Here is my code :

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class ParticleLauncher : MonoBehaviour {
 
     public ParticleSystem particleLauncher;
     [SerializeField]
     public ParticleSystem particleLauncher1;
     [SerializeField]
     public ParticleSystem particleLauncher2;
     [SerializeField]
     public ParticleSystem particleLauncher3;
     [SerializeField]
     public ParticleSystem particleLauncher4;
     [SerializeField]
     public ParticleSystem particleLauncher5;
     [SerializeField]
     public ParticleSystem particleLauncher6;

/ I put 1 particle Launcher for each particle I want to emit (children + parent), i know is absolutly not optimise/

     public GameObject camera;
 
 
     void Start () {
     }
 
     void Update () {
 
         Debug.Log (camera.GetComponent<cameraScript>().checkbutton);
 /* checkbutton is a bool in an other script of my game with return true or false (it works well)*/

         if (camera.GetComponent<cameraScript>().checkbutton == true) {
 
             particleLauncher.Emit(1);
             particleLauncher1.Emit(1);
             particleLauncher2.Emit(1);
             particleLauncher3.Emit(1);
             particleLauncher4.Emit(1);
             particleLauncher5.Emit(1);
             particleLauncher6.Emit(1);
         }
     }
 }

Many thanks in advance for your assistance =)